Any reference to shantying before the 1860s is valuable, and the discovery of an actual fragment from 1835-38 especially so.

"Highland Laddie" does not appear in the first edition of Davis & Tozer, but it does in the third. I have never seen Edition 2.

D & T's publication dates are uncertain. The likely dates (based on the British Library record, information in WorldCat, and D & T's prefaces) seem to be 1886 or '87 for the first edition, 1888 for the second, and some time in the very early '90s for the third.

The tune of D & T's "Highland Laddie" differs a little from the usual. The words have nothing to do with ports, however. They narrate instead the laddie's whaling career.