Green’s Dictionary of Slang

remarkably, splendidly, well.

1832		Satirist (London) 12 Feb. 56/1: More Immense Clever Men!—The Fermanagh Reporter says, ‘The talent displayed by Lord Loftus, and his brother, Lord George [...] excited the greatest admiration’.
1861		(con. 1840s–50s) H. Mayhew London Labour and London Poor III 146/1: It [ a comic ballet] goes immense. I’ve played in it during my time more than 400 times.