In the Dickensian era, was a capital letter preserved through apostrophe contractions?
An instance of precisely this use is the common 18th- and 19th-century abbreviation by London financial traders of Exchange (referring to the Stock Exchange or the Royal Exchange) to ’Change , most often in the phrase on ’Change.
A quick troll through Google Books suggests that in the 18th century both the apostrophe and the capital were used or omitted freely with this short form; but in the 19th century both are standard, although not inevitable.