Green’s Dictionary of Slang

Sir Oliver n.

the moon.

1821		‘An Amateur’ Real Life in London II 281: We may as well pad (walk) it, as Sir Oliver (the moon) is not out to night.
1830		Egan Finish to the Adventures of Tom and Jerry (1889) 61: I am in haste to arrive at Hawthorn Hall before Sir Oliver goes to bed [fn. ‘Sir Oliver’ is a cant phrase for the Moon].
1833		‘My Dimber Mot’ in Regular Thing, And No Mistake 66: When Charleys in their wink cribs squat, / And padders rum, are loosed: / When coveys tip a flashy chaunt / Beneath Sir Olive’s glare, / And upright doxies sport and flaunt, / And bargain for their ware.
1927		(con. 1835–40) P. Herring Bold Bendigo 81: There’s Sir Oliver with his silver candlestick come to light us all to bed.