The Cassin diaries are contained in six volumes. The first, spanning 1865-66, documents his travel by steamer. Cassin records crossing the equator (7/30/1865), visiting a volcano at Cape Verde (7/25/1865), and arriving in Brazil. Enterprising researchers might research his course using the longitudes and latitudes he records throughout this volume.
 
The second volume picks up more than a year later and commits significant attention to the medical profession. The first entry voices concern about the medical department at the University of Pennsylvania (12/10/1868), and subsequent pages enclose copies of letters from 1869, including his committee appointments, especially Assistant Surgeon in the Navy (4/2/1869). Sequential entries begin in earnest on 5/6/1869, when Cassin recounts his travels aboard the brig Ohieflaua from the Chicago Harbor to Lake St. Clair.
 
Cassin's third and fourth volumes are less descriptive but remarkable for the extent of his travels. In his 1870 "New York" diary, Cassin notes another journey to Brazil in June, South China Sea in August, and Hong Kong and Shanghai in September. His 1870-71 diary dovetails with the latter, recording a trip to Rio de Janeiro (6/6/1870) and undated notes pertaining to a voyage to South Africa. Once again, Cassin captures many longitudes and latitudes.
 
The "Clayton's Octovo Diary 1872" is perhaps the richest from an ethnographic perspective. Cassin provides detailed accounts of visits to Key West (2/10/1872), Havana and Matanzas (between February and April 1872), and even a brief reflection on the act of journaling. "A diary is something like a resolve to call professionally on a dentist
 
you may keep it, but the chances are much in the favor of your putting it off," Cassin observes on 4/26/7182. "Diary writing is almost the stupidest thing that I know of, unless one can make a writing task in no other way." Between May and June 1872, he travels throughout the Caribbean, furnishing descriptions of the peoples and villages he encounters. Interested researchers will find a particularly evocative entry of Key West society women in a 6/21/1872 quotation below.
 
A Pocket Diary dated 1875, finds Cassin landlocked, maintaining a more traditional journal of meetings, calls, letters, and weather conditions. The volume opens in St. Louis where he has apparently purchased a home, and it is not until September that he begins to travel again. That fall he returns to Brazil (11/6) and visits Uruguay (12/1).

Serving as a U.S. Navy physician, Charles Luke Cassin traveled extensively, recording firsthand accounts of Brazil, Canada, South Africa, the South China Sea, and the Caribbean during the postbellum period. His six-volume journal, which spans 1865-1875, offers glimpses at those far flung locations and the various peoples who inhabited them. Cassin's journals ought to appeal to a wide range of researchers, including those interested in the history of seafaring, the West Indies, ethnography, and late-eighteenth-century medical practices.
 
The Cassin diaries are contained in six volumes. The first, spanning 1865-66, documents his travel by steamer. Cassin records crossing the equator (7/30/1865), visiting a volcano at Cape Verde (7/25/1865), and arriving in Brazil. Enterprising researchers might research his course using the longitudes and latitudes he records throughout this volume.
 
The second volume picks up more than a year later and commits significant attention to the medical profession. The first entry voices concern about the medical department at the University of Pennsylvania (12/10/1868), and subsequent pages enclose copies of letters from 1869, including his committee appointments, especially Assistant Surgeon in the Navy (4/2/1869). Sequential entries begin in earnest on 5/6/1869, when Cassin recounts his travels aboard the brig Ohieflaua from the Chicago Harbor to Lake St. Clair.
 
Cassin's third and fourth volumes are less descriptive but remarkable for the extent of his travels. In his 1870 "New York" diary, Cassin notes another journey to Brazil in June, South China Sea in August, and Hong Kong and Shanghai in September. His 1870-71 diary dovetails with the latter, recording a trip to Rio de Janeiro (6/6/1870) and undated notes pertaining to a voyage to South Africa. Once again, Cassin captures many longitudes and latitudes.
 
The "Clayton's Octovo Diary 1872" is perhaps the richest from an ethnographic perspective. Cassin provides detailed accounts of visits to Key West (2/10/1872), Havana and Matanzas (between February and April 1872), and even a brief reflection on the act of journaling. "A diary is something like a resolve to call professionally on a dentist
 
you may keep it, but the chances are much in the favor of your putting it off," Cassin observes on 4/26/7182. "Diary writing is almost the stupidest thing that I know of, unless one can make a writing task in no other way." Between May and June 1872, he travels throughout the Caribbean, furnishing descriptions of the peoples and villages he encounters. Interested researchers will find a particularly evocative entry of Key West society women in a 6/21/1872 quotation below.
 
A Pocket Diary dated 1875, finds Cassin landlocked, maintaining a more traditional journal of meetings, calls, letters, and weather conditions. The volume opens in St. Louis where he has apparently purchased a home, and it is not until September that he begins to travel again. That fall he returns to Brazil (11/6) and visits Uruguay (12/1).

In contrast to many other scientists, Donaldson captures many world events in his journal. Entries include an on-the-ground account of the 1893 World's Fair (5/13-5/27/1893) and news pertaining to the Great Baltimore Fire (2/7/1904), Russo-Japanese War (2/8/1904), and World War I. Donaldson studiously records the spread of war in Europe (7/31/1914), the increasing likelihood of U.S. involvement (2/4/1917), and false reports of peace. Several days before the Armistice, he writes, "Peace was reported here about 1 pm. The town went wild & remained wild most of the night. Report was a hoax" (11/7/1918). Donaldson also proves an active observer of and participant in U.S. politics. For example, in addition to recording the election of President Wilson (11/5/1912) and death of President Harding (8/2/1923), he writes that he travels to Harrisburg to lobby against an "anti-vivisection bill" (4/25/1907) and attends a "League of Nations dinner" (1/15/1932).
 
Perhaps most surprising is how personal affairs infiltrate the Donaldson diaries. Sometimes such asides are amusing
 
for example, in one entry he writes that he was "attacked by goose without cause" (3/31/1917). Elsewhere, they're more serious and evocative. Shortly after Donaldson writes that his first wife, Julia, is "diagnosed melancholia" and put on an "opium treatment" (9/13/1904), he records her suicide: "our dear Julia was found dead by her own hand at 7 o'clock this morning. She was still warm when found. It is desolation—the saddest of days" (11/10/1904). Several years later, he notes his engagement to Emma Brock (3/1/1907) and, still later, the birth of a son Harry, (3/16/1920). In the 1930s, his health appears to deteriorate: Donaldson begins tracking weight fluctuations on 7/13/1931 and undergoes a metabolism test on 10/17/1934. His last entry, written in third-person in a different hand, appears to have been maintained by someone else, possibly Emma. The diary concludes, "The end at 2 a.m." (1/23/1938).

Contained in 49 volumes, the Herbert Donaldson diaries traverse 1890-1938 and provide glimpses of his neurological work at the University of Chicago and the Wistar Institute in Philadelphia, meetings with leading scientists--including Boas and Davenport--European and American travels, recreational activities, personal affairs, and leadership at the National Academy of the Sciences, the American Neurological Association, the Physiological Society, the Lenape Club, the Rush Society, as well as the American Philosophical Society, where he was elected a member in 1906 and vice president in 1935. The Donaldson diaries may interest researchers exploring the history of mental health, American Philosophical Society membership, twentieth-century U.S. politics, the 1893 World's Fair, and World War I.
 
In contrast to many other scientists, Donaldson captures many world events in his journal. Entries include an on-the-ground account of the 1893 World's Fair (5/13-5/27/1893) and news pertaining to the Great Baltimore Fire (2/7/1904), Russo-Japanese War (2/8/1904), and World War I. Donaldson studiously records the spread of war in Europe (7/31/1914), the increasing likelihood of U.S. involvement (2/4/1917), and false reports of peace. Several days before the Armistice, he writes, "Peace was reported here about 1 pm. The town went wild & remained wild most of the night. Report was a hoax" (11/7/1918). Donaldson also proves an active observer of and participant in U.S. politics. For example, in addition to recording the election of President Wilson (11/5/1912) and death of President Harding (8/2/1923), he writes that he travels to Harrisburg to lobby against an "anti-vivisection bill" (4/25/1907) and attends a "League of Nations dinner" (1/15/1932).
 
Perhaps most surprising is how personal affairs infiltrate the Donaldson diaries. Sometimes such asides are amusing
 
for example, in one entry he writes that he was "attacked by goose without cause" (3/31/1917). Elsewhere, they're more serious and evocative. Shortly after Donaldson writes that his first wife, Julia, is "diagnosed melancholia" and put on an "opium treatment" (9/13/1904), he records her suicide: "our dear Julia was found dead by her own hand at 7 o'clock this morning. She was still warm when found. It is desolation—the saddest of days" (11/10/1904). Several years later, he notes his engagement to Emma Brock (3/1/1907) and, still later, the birth of a son Harry, (3/16/1920). In the 1930s, his health appears to deteriorate: Donaldson begins tracking weight fluctuations on 7/13/1931 and undergoes a metabolism test on 10/17/1934. His last entry, written in third-person in a different hand, appears to have been maintained by someone else, possibly Emma. The diary concludes, "The end at 2 a.m." (1/23/1938).