He found them some years ago in the loft of his home in Troon, when he was getting set to move, and has tried then and since to trace the owners - so far wih no success.
Mr McManus said: “With the growth of social media, and having rediscovered them in a cupboard, I felt I should try again.
“The case contains a family photo album with pictures of babies and toddlers on a beach as well as group shots of adults.
“Some of these are dated 1952 and I am certain they will be of sentimental value to surviving family members”.
He added: “The papers refer to an Arthur Doyle, 237 Grahamsdyke Street, Laurieston, but I do not believe any of the family still live at this address.
“From what I managed to previously establish I think this Mr Doyle was a school teacher in Falkirk.
“He may also have been part of the church or at least present at the opening of the Church of God, Parkburn Road, Kilsyth. there is a programme from the opening/dedication ceremony for this in the bag too”.