Just reading through your post again and notice that you have Vincent starting on 25/12/22 (Christmas day) !
That does seem a bit odd, I intend to back to to library to do some more research into the Moncrieff archives and will recheck that date. In Scotland a person could leave school at the Christmas break if they were of school leaving age and not stay on till the Summer break.
You also show him as working in the Hendries Dept. Any idea what that might be as I can find no trace of what Hendries are.
The job title Hendries Dept is used throughout the ledger, I will try and find some more information on the subject when I return to the library.
Below is a sample of the ledger showing Salvador, Paul and Augustin signature in the ledger.