Green’s Dictionary of Slang

rich, well-off.

c.1698		B.E. Dict. Canting Crew n.p.: Inlayed, well inlayed, at ease in his Fortune, or full of Money.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue n.p.: Inlaid, well inlaid; in easy circumstances, rich or well to pass.
1811		Lex. Balatronicum [as cit. 1785].
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue [as cit. 1785].
1859		Matsell Vocabulum.
1862		E. de la Bédollière Londres et les Anglais 315/2: well inlaid, à son aise.
1882		Dly Dispatch (Richmond, VA) 1 Nov. 3/3: A cove is at ‘high tide’ or ‘inlaid’ or has a ‘mint’ when he has plenty of money.