We periodically receive announcements from the Ipswich (Massachusetts) Historical Society, informing us of their activities. (The John Whipple House in Ipswich is one of their main attractions.)
The Ipswich Historical Society web site is at www.ipswichmuseum.org. Email them at firstname.lastname@example.org or phone them at 978-356-2811.
John Whipple has a page in the Whipple Genweb. (Note: This John Whipple is one of dozens or hundreds in the Whipple Genweb. This is not the same person as Captain John Whipple of Providence, Rhode Island.)
The Whipple Website has a page about the two immigrants named John Whipple: Two Immigrants Named John.