Sorry,
Melly, but that really isn't enough information for helpful volunteers to go on.
There is no record in the marriage indexes at
www.scotlandspeople.gov.uk of a Peter Innes marrying a Mary Innes at any time after 1855 in any place in Scotland. There are 19 records of a Peter Innes marrying a Mary, but none in either Aberdeen or Moray. The closest in time are one in 1891 in Dundee and one in 1901 in Edinburgh.
What was Mary's maiden surname? Why, if they married in Aberdeen, are you asking on the Moray forum - what is their connection to Moray?
Presumably you are looking into one or other of their children, in which case what was the child's name, when and where was the child born?
Have you tried the 1911 or 1901 census, both available on Scotland's People, or one of the commercially available transcriptions of the 1901 census?
