My too sloppy notes say Hugill's pal Prof. J. Glynne Davies is Gwion Davies' father and the whaler was the Southern Empress but it's not mentioned anywhere in thread.

Mr. Gwion Davies of Llanfairfechan gave me a similar version often sung aborad a certain South Georgia whaler. He said that the second 'Rownd yr Horn!' would be yelled out in English—'Round the Horrrn!'
Lyr Add: Hob-i-derry Dando