One volume contains songs for guitar and piano, the other compositions and arrangements for guitar. Peale and his wife copied some, if not all, from the works of various composers.

These papers consist chiefly of essays presented by the members, with such titles as "Ambition," "On Avarice," "State of Literature in the United States," and "Consequences of the French Revolution." Also included are several letters, including one from Benjamin Say, Jr.

Comedies and tragedies, possibly not all by Mme. Brillon, entitled :La mort de Sénèque," "Charles le Mauvais, roi de Navarre; ou, La clémence du roi Jean," "Charles premier, roi d'Angleterre," "Marguerite d'Anjou, reine d'Angleterre," "Molière aux enfers," "Le songe, opéra comique," and "Le bienfaisant maladroit; ou, plus de bruit que de besogne."

Principally by Mme. Brillon, these compositions include marches, sonatas, and songs. Included is "La Marche des Insurgents" which Mme. Brillon composed after receiving news from Benjamin Franklin of General Burgoyne's surrender at Saratoga in 1777.

Having made his fortune as a goldsmith and silversmith, John Leacock (1729-1802) became one of Philadelphia's most energetic entrepreneurs in viticulture and a playwright and parodist in the cause of American Independence. Despite bearing the title, "Observations, Experiments etc. extracted from the Philosophical Transactions respecting farming, gardening, etc.," the notebook kept by the silversmith, viticulturist, and writer, John Leacock, is actually a combination of commonplace book, notebook, and receipt book. Consisting of 58 folio pages, the book contains a hodgepodge of entries reflecting Leacock's varied interests from 1768 through at least 1781, including not only material copied from other sources on viticulture, agriculture, engraving and etching, but medicinal and culinary receipts and two original poems, a "Song [of] the Stamp Act" and "A parody on the Tempest, by R. H. Esq." It also mentions diet drinks made by James Logan and Cadwallader Evans.

These selected papers include correspondence concerning Franklin, Franklin's descendants, and Franklin's papers, extracts from Philadelphia newspapers on Franklin, papers used in Sparks' biography, miscellaneous entries in his diary (1830-1854) relating to his search for Franklin manuscripts, and his preparation of an edition of Franklin's writings. Correspondents include Henry Stevens, Jr.; Henry Stevens, Sr.; Benjamin Vaughan; Petty Vaughan; James Mease; H. D. Gilpin; J. Francis Fisher; Franklin Bache; and others.

One of the oldest houses in Philadelphia, Wyck is now a non-profit museum listed on the National Register of Historic Places. Nine generations of the Jansen-Wistar-Haines family owned the Wyck property from 1690 until 1973. The last family owner deeded 2.5 acres of land, the house and its contents, several outbuildings, a landscaped garden, and a small endowment to the Wyck Charitable Trust. The Wyck Charitable Trust and the Wyck Association now administer the preservation of the property and its educational services to the public. This collection contains diaries, letters, accounts, bills and receipts, deeds, and photographs. The collection as a whole is deepest for the period 1770-1970. Items of particular note include accounts of household expenses at Wyck from ca. 1790-1970; papers pertaining to the Academy of Natural Sciences of Philadelphia, Quaker schools, and social reform groups; agricultural and horticultural practices; and correspondence to and from cultural leaders of 18th and 19th century Philadelphia. The papers of the John S. Haines family (Ms. Coll. 52A) form part of the Wyck Papers. The papers cover the years 1845 to 1949 and are arranged into eight series.

A product of the distinctive culture of reform in antebellum Philadelphia, William Parker Foulke was the scion of the old elite who put a conservative stamp on social change. Trained as an attorney, Foulke spent much of his adult life engaging his deep amateur interest in natural history and mental philosophy and devoting himself to a variety of civic and philanthropic causes, including the colonization of formerly enslaved persons, penal reform, and cultural institutions in his native Philadelphia. The Foulke Papers are the product of the diverse social and intellectual interests of the Philadelphia attorney and philanthropist William Parker Foulke. Consisting primarily of correspondence, notes, and essays, the collection touches on Foulke's many interests. The collection includes numerous lectures delivered by Foulke along with material on the Lancaster County Prison, New York Prison Association, and the Philadelphia Society For Alleviating the Miseries of Public Prisons; notebooks concerning prisons and prisoners, including a 1846-1852 diary, and a listing of prisoners, their race, age, crime, sentence, and observations; a diary concerning the American Colonization Society (1852); a copy of an arctic diary (1853-1854) by John Wall Wilson, in the hand of Isaac Israel Hayes, which recounts much of the journey aboard the brig Advance, commanded by Elisha Kent Kane. There is also a list of buildings (1820-1841) designed by John Haviland, and material on the American Academy of Music, Philadelphia.