Flower Hill National School, Navan - 1920s pupils

[iem]

Can anyone help? I have just discovered that my father Leslie Patrick Magrath bMar1916 attended Flower Hill National School, Navan - and that he used to go by bicycle (maybe didn't live too close?).
Why he/his family were there, how long etc I have no idea.
His father was Robert Francis Magrath/McGrath, who appears in the 1911 Census in Timahoe, Kildare as a Sub-postmaster.
Does anyone have access to local directories, older relatives (well, it's worth asking!) with possible information on either family member?
Robert Francis' wife was Helena.  They seem to have been COI.  I have a 1925 photo of Leslie Patrick if anyone happens to have a relevant school photo,  .
Thanks

[iem]

Oh and ... Robert Francis is not in the Post Office Recruitment Book after 1896. The only other thing I know is that at some point he had to give up the Post Office business and went to work for the Guinness Family at Farmleigh (the Family themselves, not the factory).  Sorry I don't know how/when/why (just yet!)