The genealogy by Albert Gallatin Wheeler is truly a gigantic book. I've been through it a couple of times looking for my Wheeler who married a Whitney (Abigail Milk Wheeler married Jabez Whitney--a couple I've bored this group with before). My Wheelers weren't in the book which was disappointing. The Wheeler genealogy appears to be carefully done. I have no reason to fault it, since I couldn't find the people I was looking for, I don't have a factual basis for comparison. I don't think that A.G. Wheeler was like Pierce in that he seems to have published only this work and not a whole series of genealogies. Many of the people in the A.G. Wheeler book are also in the four-volume, but much smaller, genealogy of the Wheeler family (primarily from Massachusetts, originally of "Townend in Wiltshire") by R. H. Davis (author's name from memory and thus subject to the vagaries of increasing age). The documents on which these latter volumes were based have been deposited in the New England Historical Genealogical Society of Boston by his widow Mike Poston Rockville, Maryland.