Hamilton was taught for four years at a Dublin school run by two Jesuits, Beatty and Mulhall.
[1] In 1798 Hamilton was established as a merchant in Hamburg, and went for instruction in German to General D'Angeli, a French émigré.
[1] Moving to Paris Hamilton with the banking-house of Karcher & Co., did business with England at the time of the Peace of Amiens.
His method started with a word-for-word translation, and left instruction in grammar till a later stage.
The professors at Baltimore College ridiculed him in a play, The New Mode of Teaching, acted by their pupils.
He left the United States in July 1823, and came to London, where in eighteen months he had more than 600 pupils learning different languages, and seven teachers.
He left his school to the teachers, and afterwards taught his system in Liverpool, Manchester, Edinburgh, Dublin, Belfast, and at least other places.
Further books with literal and interlinear English translations published by Hamilton, and mostly of gospels and classics, appeared in Ancient Greek, Latin including Charles François Lhomond's Epitome Historiæ Sacræ, French including Jean Baptiste Perrin's Fables, German including Joachim Heinrich Campe's Robinson Crusoe, and Italian.