1830s Dandies by Dickens

Loretta reports:

I've been doing one of my annual re-reads of Dickens. This time it was The Pickwick Papers. Plenty of laughs, lots of interesting historical detail, and some costume mysteries.

What, pray tell, are "Oxford-mixture trousers"? How about "plush shorts and stockings"? The following, though, I think will be easy for everyone to understand, after our recent Show & Tell.

'Well, I'll bet you half a dozen of claret on it; come!' said Wilkins Flasher, Esquire, resuming the conversation to which Mr. Pell's entrance had caused a momentary interruption.

This was addressed to a very smart young gentleman who wore his hat on his right whisker, and was lounging over the desk, killing flies with a ruler. Wilkins Flasher, Esquire, was balancing himself on two legs of an office stool, spearing a wafer-box with a penknife, which he dropped every now and then with great dexterity into the very centre of a small red wafer that was stuck outside. Both gentlemen had very open waistcoats and very rolling collars, and very small boots, and very big rings, and very little watches, and very large guard-chains, and symmetrical inexpressibles, and scented pocket-handkerchiefs.