Gustavus Hamilton, vicar of Errigal and rector of Gallon, County Meath[2][3] and his wife Jane (née Cathcart).

[1] One of Hamilton's teachers was Irish painter Robert West at his school on George's Lane, Dublin.

Reily and Hamilton painted miniatures in the 1750s and 1760s, working in watercolour on ivory in the "modest" manner of Nathaniel Hone.

1761–88) and Luke Sullivan, Hamilton was a link between the earlier miniaturists in style and technical skill and those from the later 18th century.

The portrait bears stylistic similarities with the work of English miniaturist, Samuel Collins, who lived in Dublin from 1762 to 1768.