Out of curiosity, I went through a number of references to the "Jamestown Flood" and found that many people have used this name mistakenly for the Johnstown flood. Genealogical records especially have incorporated this mistake. Jamestown just seems to come to mind.

Several copies of Rickaby's book of Shanty-Boys ballads are listed by the book dealers, as low as $23, so it is not rare. Someone ought to be able to find it in their uinversity library, etc.