Bruce, This is to close to let go. My ggreatgrandfather James Allan born c. 1840, married Christina Barr, 27 April 1863 in Johnstone. Could be something to your James Allan? I believe,but with reservations, his parents to be John Allan and Jean Kane. At the time of the 1881 cencus,Abbey Church,They lived at 11 Buchannan St, Johnstone. Any kind of connection?