That is interesting about the Polly Corbet, David Allen marriage.... there does appear to be some connection.You are right about them disappearing...I couldn't find David and Polly after their marriage either.Did you also see the marriage for a Polly Corbet and Richard Powers in Monroe Couny, Michigan?Their marriage date was 8 Dec 1826.The Powers family was rather close to the St. Lawrence Allens.Also, there is a marriage record of a Nancy Corbett marrying David Allen (a different one) on 27 Oct 1805 Kinderhhok, Columbia, NY. Did you see the William Corbett in Monroe County, MI in the 1830 Census?In the 1850 Census there is a differnt William Corbett in Monroe, possibly a son.Polly was possible a daughter of the first William. My belief that my ancestor David Allen is Samuel R. Allen's son is based on the same ideas as you present for your argument.My David was born early in the 1800's in Madrid, NY.In the 1830's he spent some time in Dundas County, Ontario, by Matilda.Did you notice that many of Samuel's children also spent the 1830's in Dundas County, Ontario?George R. Allen met and married his second wife there (Susan Pemberton??).Rhoda moved there, married and stayed there.At least one of Rachel's children was born there. Family members oftened moved and lived close to one another and you say in your note.Then Samuel's son David supposedly moved to California.My David moved to California in 1858 and died there in 1887.There were several other connections including other Allen relatives who lived by my David in Michigan and in Minnesota when he lived there.Samuel's daughter Rachel married a Mr. Cady.They had a daughter, Lucy or Lucinda who married into the same Woolery family as did my David.Apparently the Woolerys and Allens were rather close too. Then the other thing the ties it in are the names.My David named his children:Samuel, Harriet, David.....many of the names of Samuel's children.My David Allen claims that both of his parents were born in Vermont.As you know, both Samuel and Sarah Jane Powers were born in Vermont After seeing so many ties to a family, you do start to believe that it is a perfect fit.But as you say in your note, we have no proof, do we?Best to keep an open mind and keep searching.The Allens in St. Lawrence were a very big family and there probably was more than one David among all of Samuel's brothers' children. Since my David was born in Madrid, I am quite sure he is part of the St. Lawrence "Allen" clan somehow. Please let me know if you find out anything more about the David Allen you are researching.Thanks!!