This is the Willingdone on his same white harse, the Cokenhape.” 

Page and Line: 
I.1 (pp. 3–29)

Cokenhape is a potent mixture of inebriating inhalants, kids.

The brand of Copenhagen brand of tobacco snuff has been around since 1822 (exactly 100 years before Ulysses was published).

Copenhape is not quite Copenhagen, the famous horse that rode with the Duke of Welliington at Waterloo. This phrase mentions a white harse and Copenhagen was not (though, curiously Napoleon’s horse Marengo was   white). “Horse,” street slang for Heroin, a product first named and marketed as a cough syrup by Bayer in 1898, has been ingested in many ways, including snorting. Speaking of which, cocaine, another snortable drug, is known on the street and in song as “white horse.”

Coke is slang for Cocaine, the name by chemist Albert Niemann gave to the coca plant alkaloid compound erythroxylum in 1860. People have been sniffing it ever since.

Coke (registered trademark of the Coca-cola company) contained trace amounts of Cocaine in its original 1885 formula.

By 1904, the amount was a mere 1/400th of a grain per ounce of syrup. Coke became completely cocaine-free in 1929, but it’s still not a good idea to put a sugary, caffeinated drink up your nose. 

Copenhape is a mash-up of tobacco, cocaine, heroin, sugar and caffeine. Snort at your own peril.