[1] He was born in Trinidad where his father was high sheriff and died at St Kilda, Melbourne, Australia.
[2] Mackworth matriculated at Trinity College, Cambridge in 1844 but it is not recorded if he took a degree.
[2] In January 1855, he was named as one of the founding "resident members" of the new Melbourne branch of Miles and Kington, a Bristol-based company of "General Agents and Commission Merchants", alongside Philip Oliphant Kington, who later played first-class cricket for Victoria.
[4] As a cricketer, Mackworth was a middle-order batsman; there is no record that he bowled nor is it known whether he was right- or left-handed.
[1] He achieved little in his one game for Cambridge University, but not out innings of 10 and 28 in the 1848 first-class match between Manchester and Sheffield – a forerunner of Lancashire and Yorkshire matches – enabled Manchester to win by 11 runs.