I've been delving into the Johnston-On-Bridge puzzle, as I have a John Johnston from Renfrewshire who married an Islay girl, Marion Brown. I've found references to the same Johnston-On-Bridge or Bridge -Of Johnston in the November 2002 Islay Archives. John Johnston's father William Johnston lived in Renfrewshire, and there's a William Johnston mentioned in the early history of Bridge of Johnston. This is all hearsay, but I thought that it might help. Toni Sinclair contributed to the discussion in 2002. Carol Rowe (Currie)