The 'Question & Answer' theme come under the umbrella of Riddles Wisely Expounded Child #1 and The Elfin Knight Child #2, of which variants are Cambric Shirt and Scarborough/Whittingham (and no doubt other) Fairs.

The tune of Bob Dylans's Dream is that of Lord Franklin, not Randal Child #12. Whale fishing, maybe (though they were supposed to be seeking the North West passage), but not poisonous eels.