Thank you for correcting me.
There was no middle name attached on his birth certificate, but I wonder if he added it as his mother`s middle name was Guthrie.
As for the service numbers, unless you know them previously, you are up against the proverbial brick wall.
Still wondering where and how he signed up. I may have to look out a photograph of him to uncover his regiment on his cap.
Thank you once again for your timely reply.