I have come across this grave which is a possiblilty for James Byrne in 1903https://www.findagrave.com/memorial/80002804/james-byrne
Quote from: Bellevue on Monday 17 May 21 11:31 BST (UK) I have come across this grave which is a possiblilty for James Byrne in 1903https://www.findagrave.com/memorial/80002804/james-byrneThe date on the stone is transcribed as 30 April 1902Death notice in the The San Francisco Call San Francisco, California01 May 1902, Thu Page 13 states he was 75 years old So born 1825.https://www.newspapers.com/clip/77839486/obituary-for-james-byrne-aged-75/Sandra
Have you seen this tree on family search - says James Burns was born 1842 and Margaton Ann Duggan 1847https://www.familysearch.org/tree/pedigree/landscape/L4XR-WT7Sandra