1784 R. Cumberland Natural Son in Inchbald (ed.) Modern Theatre V (1811) 248: We should have had a terrible journey of it, if we had not luckily fallen in with a black job by the way, and kept company with the corpse to Exeter cathedral.at black job (n.) under black, adj.
1785 R. Cumberland Natural Son III i: Mr. Latimer will give her the go-by.at give someone/something the go-by (v.) under go-by, n.