Considering the time interval between your posting, and me replying, the speed of your answer is supersonic.
We are trying to re assemble an admissions ledger from the only source left, the alphabetic index. Fortunately, the information, tho sparse, has proved to be ideal for the project.
And, already, a pseudo format is beginning to take shape.
It will provide a link between the Hibernian boys and the Regiments of their fathers, a direct line to further research via the muster rolls.
Any information is welcome, as we are trying to add a tail piece to all those entered into the ledger.
If you trawl the net for DYRMS, or Duke of York's Royal Military School. there is a segment on the RHMS.
Thanks for your speedy response.