Previously I had identified a Donald Brock and Catherine Miller as the parents of William Brock, a road carter from Thurso, from his death certificate. William died in Thurso, aged 80 on May 13, 1884. I am trying to get a bit further back, which is proving difficult. However, as this branch of the Brocks are fairly unique in Thurso at that time, I just noticed that in the 1851 Census there is a Catherine Brock, aged "100", a widow, living with her step-son. (She is in the 1841 Census too, aged "75"). She was born in Wick. I am wondering if this could be Catherine Brock (nee Miller). I can't find a death for her in the OPRs between 1851 and 1855 and have even checked the deaths after 1855 on Scotlands People. I can't find a marriage/banns for her and Donald Brock (most probably they never married), nor can I find any record of Donald's death or burial. He must have died sometime between 1803 and 1841 approx.
In looking for a Donald, who could be Catherine's husband, I did find a birth/baptism for a Donald Sinclair Brock (parents Donald Brock and Elspeth Plowman) in Ackergill, near Wick, but am confused with the date. The entry after his December birth looks like January 1760, but the printed header at the top of the Scotland People file says 1767.
Expert help, advice needed!