Green’s Dictionary of Slang

the Mogul Music Hall, later the Middlesex.

1828		Sussex Advertiser 7 Jan. 2/2: At the Mogul — or, as Mr B called it, the Mo Gull, in Drury Lane.
1883		press cutting in J. Ware Passing Eng. of the Victorian Era (1909) 116/2: What was the good, thought we, of saving your rhino, if you’ve got no girl to take for trots down the Lane or into the Mo.
1899		Reynolds’s Newspaper 8 Jan. 2/6: He determined to [...] have four penn’orth at the Mo’.
1900		Marvel 21 Dec. 15: I trotted that trotter-storl gel to the Mo fer a 2 penerth up in the gawds.
1909		J. Ware Passing Eng. of the Victorian Era 116/2: Down the Lane and into the Mo (Central London, Low). Here the Lane is that called Drury; the ‘Mo’ is abbreviated ‘Mogul Music Hall’.
1919		Aberdeen Jrnl 29 July 3/7: He was the original proprietor of ‘Old Mo’, Drury Lane, now the Winter Gardens Theatre.
1929		J.B. Booth London Town 126: When he first went to the Middlesex – the old Mo.