Having therefore consulted with my Wife, and some of my Acquaintance, I determined to go again to Sea. I was Surgeon successively in two Ships, and made several Voyages, for six Years, to the East and West-Indies; by which I got some Addition to my Fortune. My Hours of Leisure I spent in reading the best Authors, ancient and modern; being always provided with a good Number of Books; and when I was ashore, in observing the Manners and Dispositions of the People, as well as learning their Language; wherein I had a great Facility by the Strength of my Memory.
One of the meaning of the "Facility" is "Talent" but I don't think here it is in this meaning.
Dose the whole phrase in bold mean: because of my good memory I easily learned many things?
Source: Gulliver's Travels