Anson family in the Hotel business ?
 

I picked up a Civil War CDV with the back stamp from:

Anson's
Metropolitan Hotel

could this be from Cap's family tree ?

Anson's is the photography studio name opposite the Metropolitan Hotel.........highly unlikely..........who knows....

That would be Rufus P. Anson a fairly highly regarded photographer of the mid to late 19th century. It's possible he is a cousin of some degree to Cap, Rufus is from Dutchess county, NY as was Cap's Grandfather.

thanks for the info !

Cap Anson hailed from Marshalltown, Iowa

Barry,
That is correct, his father Henry was the founding father of the city. His father was also born in Dutchess county, NY.