zanzibar: What's the source of this game?
It is important, since I think it's likely the somewhat famous Mayerhofer win in the <Cup Tourney> aka <London Chess Club Tournament (1851)> (the "other" London tournament).
According to the last supplemental chapter in the German translation of Stauton's <London (1851)> tournament book, this win caused Harrwitz to drop out of the "other" tournament, conceding victory to Anderssen (as far as Harrwitz was concerned that is).
Several years later Staunton referenced this in his infamous <retreating general> diatribe against Harrwitz, found on p180 of <Chess Player's Chronicle v15 (1854)>
<HERR HARRWITZ AND HIS SUPPORTERS
Be it remembered that the facts, of which we have given a cursory notice, are not unimportant, as they establish a kind of prima facie evidence, that Herr Harrwitz is a <retreating general>. We have, indeed, for some time been acquainted with his Fabian accomplishments; but, as others are perhaps hardly aware of them, we shall only remark that his behaviour, on the occasion that we have alluded to, was to have been expected from the player, who tried every means in his power to avoid finishing his first match with Mr. Staunton ; ... who <fled even after the loss of a single game, from the scrambling affair of the same year at the London Chess club>, whose whole life, in short, has been devoted to the illustration of the character of the "Runaway Apprentice."†