Container ships, cruise ships, cargo ships and other vessels bound for Halifax Harbour the week of Oct. 9-15, 2023. Most of The Beatles’ catalogue, at least as history remembers it today, started with what remains the most successful songwriting duo in all of popular music: John Lennon and Paul McCartney. So prolific were the two at their craft—and so symbiotic was their relationship—that even today, reciting their names rolls off the tongue like a single word: Lennonandmccartney…