Ontario History, Volumes 1-4
"It is certain that many of the Londonderry [New Hampshire] Loyalists whose names are mentioned herein as signers of the petition in favor of Col. Stephen Holland came to Canada in 1784."
The Londonderry News, published 4 July 2014, A Local Stand Against the King, the Londonderry Riot, related that Stephen Holland was a spy.
"It is now known with certainty that our local judge and taverner Stephen Holland was a British spy and was in communication with General Howe."
The blog, Smith History, has some detailed information about Stephen Holland.
The American Antiquarian listed the below inventoried letter:
2 Rep. No.: MSS Dudley 3
Original, 1 letter.
Robert Smith to John Dudley, Londonderry, N.H., 10 August 1779. Discusses his fears over the activities of suspected Loyalists, especially the remaining family and confederates of Stephen Holland of Londonderry. John Dudley Family Papers, 1728-1853.