"...the college was... put into the hands of Mr Willard as Vice President, who readily accepted of the offer without so much as once consulting with me about it." Autobiography of Increase Matherp 351. This passage was written in 1703 according to introduction by MG Hall.
colonialsociety.org
The Diary of Michael Wigglesworth, 1653-1657 transcribed and printed by Colonial Society of Massachusetts, December, 1946, here
Salem Village Church Recordbook, with entries by Parris, is held by Danvers Library. Parris notes the pressure coming from Willard in the October 13,1693, entry.
Increase Mather Cases bound with Cotton Mather Wonders of the Invisible World in 1862 London reprint. Willard's introduction p 221 and the signers of the introduction, including Wigglesworth, p 224
Robert Calef, More Wonders of the Invisible World, 1700, reprinted as The Witchcraft Delusion, Vol II, 1866 p 151
Charles W. Upham quotes extensively from this letter in Salem Witchcraft and Cotton Mather, 1869, p 67
