I want to call attention to Gibb's excellent listings of all of the songs that we have been able to find so far, with references, by decade and as a set list to compare with what we know today. You will find all of this over on the "Advent & Development of Chanties" thread beginning here:

thread.cfm?threadid=128220&messages=281#2897809

I want to thank him for doing this very good summary. When you look at his last "set list", it is amazing that there are 47 documented songs on there that we know today. That means songs with some lyrics that are familiar. It is also very interesting what is *not* on there. Three that stand out in my mind are "South Australia", "Shallow Brown", and "Banks of the Sacramento". The search goes on.