Nick Russell is the author of a September 21, 2009 post to the RV.net website about the Dalton Gang Hideout in the "friendly little town of Meade, Kansas." The beginning of the fifth paragraph begins with Eva Dalton Whipple, "sister to the infamous Dalton Gang." It's an interesting read!
Eva (at http://whipple.org/93710) was the wife of John N. Whipple, born in April 1841 in Connecticut (according to the 1900 census). I still don't know who his parents were (but will likely begin looking as soon as I finish this post :-).
Many thanks to Blaine Whipple for informing me about the link!