These are letters to Thomas Clarke, Isaac Roberdeau, and Jonathan Williams, Jr., about the defense of Philadelphia against possible British attack.

This volume includes a journal of a campaign in Hungary (1737), and a diary (1738-1739) written in German.

Volume one includes an account of a voyage from England to St. Petersburg and of a journey from thence by Moscow through Poland to meet the Russian army. Plates consist chiefly of plans of battle fields. Volume one contains also List of expenses in the German language. A short index to various articles that are not in the volume. Project de commerce entre l'Angleterre et la Russie. Oraison funebre prononcé a St. Petersbourg le 10 Mars, 1725 a l'occasion de la lort de Pierre le Grand...par M. Theoplane... Volume two includes a section entitled "Literæ processus ssmi domini nostri Clementis--Papæ XII."

Included in this volume are short treatises on military topics, such as fortification and geometry, and military discipline; an account of campaigns (1689-1697) with the Royal Regiment of Foot in Ireland fighting the Williamite War between King James II and King William III, an account of campaigns under Prince Eugene of Savoy, with lists of troops; a section entitled "Un traittes touchant les conquètes quon pouroit faire en Amerique sur la maison de Bourbon au cas que la querre devienne generale et qui seules peuvent retablir lequilibre de l'Europe;" and lists of imperial regiments. Volume describes campaigns that took place during the successive reign of William of Orange, Queen Anne, George I and George II. British officers of note are John Lindsay, 20th Earl of Crawford and John Churchill, Duke of Marlborough.

An early settler and prominent citizen in the Moravian heartland near Bethlehem, Pennsylvania, Timothy Horsfield was named justice of the peace when Northampton County was formed out of Bucks in 1752, and was one of those given responsibility for the defence of the local white and Christian Indian populations during the French and Indian War. The Horsfield Papers offer a window onto the tumultuous history of northeastern Pennsylvania during the 1750s and 1760s. Comprised largely of correspondence and related documents between Horsfield, William Parsons, and provincial and military authorities, the collection includes important information on the Native tribes' actions (previously described as "Indian assaults") in the region in 1756 and 1757 and the military and diplomatic response of settlers.

A Sachem and Civil War adjutant to Ulysses Grant, Ely Samuel Parker was an important figure in the Seneca Indian nation during the first half of the nineteenth century. Trained as an engineer, Parker was deeply involved in the Senecas' land disputes with the Ogden Land Company and he played an important role in interpreting Seneca culture for a white audience, most notably as a consultant for Lewis Henry Morgan. Collected by Arthur C. Parker, the Ely Samuel Parker Papers include correspondence, manuscripts, and printed materials relating primarily to Seneca affairs, history, language, and culture, as well as politics, education, engineering, and the Civil War. Among Parker's correspondents were Henry Clay, Millard Fillmore, Henry M. Flagler, Lewis Henry Morgan, Henry Rowe Schoolcraft, Daniel Webster, and Asher Wright. Several letters relate to Parker's service as engineer of public buildings in Galena, Illinois, and to his Masonic activities. Among the noteworthy items in the collection are several essays on Seneca history and culture, a fragment of Parker's diary, 1847, and a significant quantity of material on the Seneca language assembled by Asher Wright.