Green’s Dictionary of Slang

a maid-of-all-work.

1841		Dickens Old Curiosity Shop (1999) 431: ‘To make it seem more real and pleasant, I shall call you the Marchioness, do you hear?’ The small servant nodded.
1864, 1867, 1870		Hotten Sl. Dict.
1872		Leamington Spa Courier 3 Aug. 4/2: Who has not seen a little ‘Marchioness,’ or kitchen-maid, taken from penruy, waste good food.
1883		G.A. Sala in Illus. London News 24 Nov. 499 col. 1: I light upon the London papers, containing alarming statements about a little bit of a maid-of-all-work... This marchioness down in Shrewsbury Vale has [...] been the object of the most astounding ‘manifestations’ [F&H].
1897		London Dly News 6 Oct. 2/5: A poor little marchioness of a maid servant.