I didnt find much more in my Monroe Co stuff but did some digging online and found some interesting leads for you:

http://www.kindredkonnections.com/cgi-bin/nextpedsf?20169367...

1. NICHOLS, HENRY R - Born: 1826, Father: NICHOLS, DANIEL, Mother: MERRYFIELD, EUNICE

http://genforum.genealogy.com/cgi-bin/pageload.cgi?nichols::...

Eunice Merryfield & Deniel L. Nichols
Posted by: Ethel Hansen (ID *****7563) Date: April 20, 2004 at 13:17:47
of 498


The late John Ingles Jr. compiled "The Desendants of Daniel L. Nichols" b ca 1800 NY and wife
Eunice Merryfield. She was the dau of Richard
Merrifield and Sophina Merryfield [sic] and step-
dau of Moses Jewell. Lived Orangeville, Wyoming Co., NY; Cattaraugus Co., NY; Sparta, Monroe Co., WI. See Merryfield forum for important War of
1812 material on Richard. It is too long to copy. This book is out of print but is available on microfilm at LDS Family History Centers. Eunice (sp Unice in Richard's will) buried at
Sparta; Daniel L.'s resting place has not been found. My 2GGparents. Early Monroe Co. WI history mistakenly calls her "Mayfield."

You might go to the genforum link above and contact person who made the post.