We have a Gerow Family Association connected with the Huguenot Historical Society in New Paltz, NY. During the 1980's, the Association published a 3-vol. genealogy. I checked it and Eleazer Baldwin Gerow and his son, James Crosby, are listed in the second volume. I don't know if the line continues in the 3rd volume as I do not have that. It is not as good as the other volumes. The 3-vol. set is available for $30 now.
Daniel Gerow and his wife, Elizabeth Coutant, settled in Plattekill, Ulster County, NY, about 1781. Their sons, William, Elias, and John, had moved to Plattekill about 1775 or 1775. I am a descendant of William Gerow. Plattekill is about 15 miles south of New Paltz. The Huguenot Historical Society has some Gerow deeds and wills in their Archives. The HHS website ishttp://www.hhs-newpaltz.org
The Gerow Family website is http://www.gerowfamily.org
I hope you will tell your friend about the Gerow Family Association.