Chanties aside, I did find the book very interesting and informative. I read it because someone made the claim here that it contained reference to chanties, or even some texts. It did help me with some other research. I looked up Bullen and found a wide range of titles he'd written, and wonder if any of the others contain useful references. Most can be obtained cheaply.
Here's a list. If anyone has read any of them and can confirm any chanty references or texts that would be helpful.
Idylls of the Sea 1899
Log of a Sea Waif 1899
The Men of the Merchant Service 1900
Deep Sea Plundering 1901
Creatures of the Sea 1902
A Whaleman's Wife (novel) 1902
With Christ at Sea 1902
Sea Puritans 1904
Sea-Wrack 1905
A Son of the Sea 1908
Beyond 1909
Fighting the Icebergs 1910
A Bounty Boy 1912
A Sack of Shakings
The Salvage of a Sailor
Sea-Spray

Some of these are collections of stories.