Egyptian hall, n. — Green’s Dictionary of Slang

Egyptian hall n.

[rhy. sl.; the Egyptian Hall was the popular name for the London Museum, established at today’s 170 Piccadilly c.1812, holding ‘upwards of Fifteen Thousand Natural and Foreign Curiosities, Antiques and Productions of the Fine Arts’. It featured an ‘Egyptian’ façade, and among the many visitors was, in 1844, General Tom Thumb. The hall was demolished in 1905]

a ball.

1859		Hotten Dict. of Modern Sl. etc.
1864, 1867, 1870		Hotten Sl. Dict.
1873		Sl. Dict.