GR translation: and even closer to true north

[Mike Jing]

V707.6-15, P721.7-16   So the conferees at the Gross Suckling Conference
here, as it will come to be known, sit around a map with their instruments,
cigarettes and speculations. Sneer not. Here is one of the great deductive
moments in postwar intelligence. Mexico is holding out for a weighting
system to make vector lengths proportional to the actual number of firings
along each one. Thomas Gwenhidwy, ever sensitive to events in geographical
space, wants to take the 1944 Blizna firings (also eastward) into account,
which would pull the arrow northward from 354°—and even closer to true
north if the firings at London and Norwich from Walcheren and Staveren are
also included.

The Blizna firings are eastward, "which would pull the arrow northward from
354°".  But the the firings at London and Norwich from Walcheren and
Staveren are westward, so how do they pull the arrow "even closer to true
north"?

I guess this makes sense if the Blizna firings pulls the arrow too much
towards the east, and the westward firings would correct that.  However,
the real "resultant" of all these firings should point towards south, while
the missing arrow would be the opposite of the resultant.  In that case,
the eastward firings would actually pull the missing bearing westward.  Am
I getting this all wrong?
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