John Martin Daniels - John Daniels date of death

I've uploaded the scan I made of the remembrance card from my mom's files. John Daniels died in 1891 and is buried in the Cloverdale Cemetery in an unmarked grave according to the cemetery records. I think the confusion is due to the fact that is wife's tombstone in New York says "wife of John Daniels" but her name has ebbed away. I trust that the card in my mom's files is correct, as she was his granddaughter.