Yes it seems the street lit printers in Scotland were using the published collections to fill up their chapbooks, thus recirculating particular versions. Here we have examples of Herd and Jamieson being used and I'm pretty certain Scott's Minstrelsy was treated in the same way. Of course some of the upmarket printers also raided Percy.


FWIW 11D appears to be a hybrid of 10 & 11.
Yes 11K should not really be accepted as a version of 11 by modern standards, a one-off rewrite perhaps.