Francis married a Charles Dougherty but I have no documentation for that marriage and there are many Charles Dougherty's in NY at the time.
What happened to Clarinda?
I do find a Clarinda Every or Evey in Middletown, Delaware County, age 26, on the 1870 census. Could that be Clarinda Oliver? I don't know. If it is, she and her family disappear again as of the 1880 census.
Let me know if you find her anywhere.
My task now, as I've set it, is to trace each individual in my database from birth to death with as much concrete documentation as I can find, beginning with direct line ancestors but working through the entire database. Quite an undertaking with over 3,200 individuals in the database.
Documentation: I prefer to have 3 corroborating sources, particularly if there is anything iffy about any particular document. Over the years, I've found so many oddities in documents, so many nearly identical individuals (names, places, ages, dates, etc.) that I begin with skepticism and work toward trust.
Clearly, many, many people were either completely disinterested in leaving evidence of their existence or worked to conceal it.
Clearly, many, many people are very poor spellers, have very poor penmanship (including myself) and seem shy about asking how to spell a name.
In any case, I highly recommend not jumping to conclusions in searching for relatives and ancestors. You will be very surprised at the number of individuals with the identical name, born the same year, living in nearly the same place. Do a web or Facebook search -- you'll be surprised.