Green’s Dictionary of Slang

(UK Und.) to transport overseas as a punishment; thus marinated, transported to a foreign penal colony.

1674		Head Canting Academy (2nd edn) 16: One whereof was so severely (flaugg’d at the Tumbler) whipt at the Carts-arse for several mis-demeaners [...] the other (nub’d) hang’d and the last (marinated) transported.
c.1698		B.E. Dict. Canting Crew n.p.: Marinated, c. Transported into some foreign Plantation.
1707		J. Shirley Triumph of Wit.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1754		Scoundrel’s Dict. 19: To be transported – Marinated.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue n.p.: Marinated, transported to some foreign plantation.
1859, 1860		Hotten Dict. of Modern Sl. etc.
1864, 1867, 1870		Hotten Sl. Dict.
1869		Australasian (Melbourne) 17 July 8/5: To be transported is to be mmarinated to be lagged.