Our friends at the Market Rasen memories Facebook page have asked if Rasen Mail readers can help identify the young man to the right of the crease in this photograph.
The picture was taken in 1974 at Market Rasen Modern School.
This was the year the school closed and pupils were transferred to De Aston - so was this taken to mark that occasion, or were class pictures taken every year?
Contact the Market Rasen memories administrator Peter Spilman or drop us an email here at the Rasen Mail.
We would also be very pleased to hear from anyone else who has mysteries to solve.