Mackaness gives Robinson's birthdate as 1754 in the title of Odes of Michael Massey Robinson: First Poet Laureate of Australia (1754-1826)
but changes this to 1747 on p.6, and then comments on p.17 that The Australian Encyclopaedia
(1926) made an error in the dates 1747-1826 as he 'must have been born in 1744'.
A brief death notice in the Australian on 23 December 1826
states that Robinson was 92 at the time of his death. This would place his birth date c.1734.