This game can not be found in Löwenthal's 1860 collection of Morphy's games. It was published in 1873 (and possibly earlier) as having been played in 1840 by Ernest Morphy. Sergeant's source is a publication from 1882.

<(It might be mentioned at this time that the game given by Sergeant [GAME XCVII] in Morphy’s Games of Chess as played between Paul Morphy and the above-mentioned Dr. A. P. Ford was not played by Paul Morphy, nor was it a blindfold game. Dr. Ford’s opponent was Ernest Morphy, and the game was played October 5, 1840. The game was sent by Ernest Morphy himself as his game to the Cincinnati Sunday Dispatch and Porter’s Spirit of the Times in 1859. The author has the original score as recorded by Ernest Morphy. Therefore, this game should not appear in any future collection of Paul Morphy’s games.**

** EDITOR’S NOTE: Again, the whereabouts of this original score are unknown, but the preponderance of evidence provided by Lawson throughout seems to back his contention.>

Lawson (2010) - ch02 - p18 (49)

In addition, there is mention of a blindfold game between Paul and his uncle on his 12th birthday, with A.P. Ford present:

<As the year 1849 approached, Paul was demonstrating the strength of a master, and this without benefit of books as vouched for by Ernest Morphy. He now began playing with the strongest of New Orleans players, in addition to Uncle Ernest. On his twelfth birthday, June 22, 1849, Paul undertook a blindfold game against his Uncle Ernest and as he made his twentieth move, he remarked that he must now win. Thereupon, Dr. A. P. Ford, an old chess opponent of Ernest’s, carried Paul into an adjoining room and presented him with an inlaid mother-of-pearl chessboard, which is now possessed by the author.*

* EDITOR’S NOTE: In 1978, chess publisher Dale Brandreth purchased Lawson’s collection of Morphy memorabilia. He donated the bulk of Lawson’s letters and documents to the Cleveland Public Library, but they are as yet uncatalogued and unavailable to public researchers.>

Now, M.L. = Max Lange, and his 1894 edition has the game as

<Morphy, Paul -- Morphy, Ernest (New Orleans - 1849-06-22)>.

Lange actually gives this impressive, though incorrect (well, for this game), detail:

<The audience, mostly relatives and some friends of the MORPHY family, had watched the fight with eager attention. They were, as the eyewitness Dr. FORD reports that they were so surprised by the twelve-year-old blind player's powerful style of play and sure calculation of victory that they carried the boy in their arms into an adjoining room, where they played a finely carved ivory chess set that had already been prepared for his birthday to repeated applause gave presents.> (p11)

Morphy - Lange (1894) p10 (36) G-2

The original German:

<Mit gespannter Aufmerksamkeit hatten die anwesenden Zuschauer, meist Angehörige sowie einige Freunde der Familie MORPHY , den Verlauf des Kampfes beobachtet. Sie waren, wie uns der Augenzeuge Dr. FORD berichtet, von der kraft- vollen Spielweise und sicheren Siegesberechnung des zwölfjährigen Blindlingsspielers so überrascht, daß sie den Knaben auf ihren Armen in ein Nebenzimmer trugen, wo sie ihn mit einem bereits für seinen Geburtstag bereit gehaltenen fein- geschnitzten Schachspiele aus Elfenbein unter wiederholten Beifallsäußerungen beschenkten.>