six of one and half a dozen of the other - Faced with a choice between two alternatives, it doesn't matter which one chooses, because they are substantially the same thing. (For example, "six" is the same quantity of something as is "half a dozen" of that something. (The expression itself has nothing to do with fault.)

book - Pages containing words or pictures bound together with a cover.

crack on - To get on with a task

mountebank - Old-fashioned word for "cad" (itself old-fashioned) and/or dishonest/disreputable.

Stop ironing my head - Stop annoying me.

Louis - A disused French coin, circulated before the revolution. Also known as "louis d'or"

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