Dear Mr. Lyons,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located 2 series titled Monthly Reports of Transactions, 1920-1969; and Monthly Reports of Marine Activity, 1936-1961 in the Records of the U.S. Customs Service (Record Group 36) that may contain information about the cargo manifest of the RMS Queen Elizabeth in November 1961. The records are not yet digitized and available in the Catalog. For access to these series, please contact the National Archives in Washington - Textual Reference (RDT1) via email at firstname.lastname@example.org.
For additional information about the departing cargo manifest of the RMS Queen Elizabeth, we suggest that you contact the National Archives of the United Kingdom, Kew, Richmond, Surrey, TW9 4DU, United Kingdom. The website is https://www.nationalarchives.gov.uk/.
You may also wish to review Queen Elizabeth: Ships, History, Fire, & Facts for background information.
We hope this is helpful. Best of luck with your research!