More on Mountains of Mole-hills from Infoplease:

• Mountains of Mole-hills - Mountains of Mole-hills To make mountains of mole-hills. To make a great fuss about trifles. ...
• Fly - Fly (plural flys). A hackney coach, a cab. A contraction of Fly-by-night, as sedan chairs on wheels ...
• Dictionary of Phrase and Fable: M - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "M"