According to the 'Blue Books' of the Colonial Secretary, he had 12 pupils, 5 girls and 7 boys.
He appears to have been being paid 30 pounds per annum.
The cost of running the school was 10 pounds per annum and this was paid by the Colonial Treasury.
The two biggest schools listed on the same page (p.612) with 100 pupils each were Liverpool and Wollongong.
At Liverpool 67 boys and 33 girls were being schooled, and at Wollongong, 58 boys and 32 girls.
The running total at the bottom of the page is 2,373 boys and 1,733 girls.
George Mawbey and his family lived at Dural until around 1860, and I will try to find out more about his teaching there.