The Louisbourg Siege collection (25 items) consists of 19 letters, 2 receipts for goods, 1 memorandum, 1 excerpt from a journal, 2 printed maps, and one engraving. These items all concern the British siege and occupation of Louisbourg from 1745 to 1746. The writers were all part of the New Hampshire contingent of the Louisbourg expedition led by Sir William Pepperrell and Sir Peter Warren. Of note are a series of nine letters, written by Captain Thomas Westbrooke Waldron (d. 1785), to his father, Richard Waldron, of Portsmouth, New Hampshire. These letters form a running narrative of the siege and include a contemporaneous copy of the articles of capitulation. The collection contains two replies from Richard Waldron. Fellow New Hampshire officers and soldiers wrote the remaining letters, including officer Nathaniel Weare, Colonel Samuel Moore, who commanded the New Hampshire troops during the siege, and Colonel William Vaughan.
The maps depict the Harbor of Louisbourg and a plan for the city and fortifications there. The engraving is "A View of the Taking of Louisbourg in North America, by Admiral Boscawen and General Amherst," 1758, printed in London. This represents the second siege of Louisbourg.
Joseph Sabin compiled the collection into a single volume. The final seven pages contain notes on the collection, written by Victor H. Paltsits (1867-1952), the State Archivist of New York and the Chief of the American History Division and Keeper of Manuscripts at the New York Public Library.