I am not sure if this message was to me, but if it was, thank you. I had seen your message to Loretta as all messages to the Sonora board are forwarded to my email. Have you seen references to the book by Joseph Sanchez on the Spanish Bluecoats - Catalonian Volunteers in Northwestern New Spain 1767--1810"? Paperback copies are quite reasonable, (unlike hardback copies!) I found a list of Catalan family immigrants to Sonora in 1777 in the Archivo Franciscano - not many of them, and very difficult to read. I read a couple of books by Ana Maria Matute. It seems that Catalan names are quite different from Spanish names, but of course people with Spanish surnames may have been born in Catalonia.
I live in Silver Spring, MD - born in Tucson, AZ.