Ballintleva National School teachers

It is believed Hubert Dockery taught in Ballintleva National School. Hubert lived in Ballygar. He cycled from Ballygar to Ballintleva each day. In later years he did have a car. It is believed - maybe mistakenly that he was the headmaster, until he retired from teaching, round 1950 ???????

Would anyone have an idea of when he started,  and finished teaching in Ballintleva?? Also what other teachers were teaching there round the same time as Hubert??? I appreciate that this is a vague query.