From: Lars Bergman
Date: 2017 Jan 26, 15:21 -0800
Brad, regarding the crisp and clear 46', now I understand what Worsley did. I am sorry that I have bothered you by this trivial issue. The explanation is:
46' is the dlong from Wallis to the point they were aiming at. Multiply by cos 54°4' and you get 27' departure from Wallis. Worsley often (always ?) write " 27m W of Wallis" to emphazise that the 27 is dep in miles.
Will look into the other remaining issues tomorrow.