More on Hum and Haw from Infoplease:

• Hum and Haw - Hum and Haw (To). To hesitate to give a positive plain answer; to hesitate in making a speech. To ...
• The Author's Earnest Cry And Prayer - Poems and Songs of Robert Burnsby Robert Burns The Twa Dogs The Ordination The Author's Earnest ...
• Dictionary of Phrase and Fable: H - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "H"