Thank you, Thomas for your kind suggestion, but the Cromwells have no info about Ruhema Reilly.
Yet I found something of interest - Caleb's son Richard also married a Reilly, Ann Eliza Reilly (born in Lee Iowa, daughter of Matthew Reilly). Maybe she is related to Ruhema Reilly. Thats the only tread I have for Ruhema. I will try to follow it in the Iowa forum (if such forum exists).