E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Lazy as David Lawrences dog. Here Lawrence is a corruption of Larrence, an imaginary being supposed by Scottish peasantry to preside over the lazy and indolent. Laziness is called Larrence. (See and compare DAVY JONES.)
Lazy as Joe, the marine, who laid down his musket to sneeze. (Sailors proverb.)
Lazy as Ludlams dog, which leaned his head against the wall to bark. This Ludlam was the famous sorceress of Surrey, who lived in a cave near Farnham, called Ludlams Cave. She kept a dog, noted for its laziness, so that when the rustics came to consult the witch, it would hardly condescend to give notice of their approach, even with the ghost of a bark. (Ray: Proverbs.)