1835 Stampless Utica NY To Edinburgh Via Liverpool

This is my first attempt at making sense of a transatlantic stampless cover so any input would be appreciated.

Piece sent was sent post paid on 19 March 1835 from Utica NY to Edinburgh. It has a red oval double diamond Utica NY postmark and "Paid" stamp typical of that office and era. I'm not sure at what rate it was sent. There looks to be at the 18 ¾ rate marking (150 to 300 miles to NYC?) but not sure how this would account for the transatlantic portion of the journey. There is also a black "½" marking (partially framed) which I believe is for Scotland's half penny tax for mail carrying vehicles in effect at the time. Recipient's docketing indicates Edinburgh on April 20.

The back has a boxed Liverpool Ship Letter stamp and red circular stamp which I suspect was applied by the shipping agent.

The contents have to do with business matters as well as a request that some music be forwarded to someone in New York City via a "Captain E. Nye" who was apparently known to be in Liverpool at the time.

What am I missing and what else can deduced from the cover?

Hi RK1468 - these transatlantic covers are difficult to understand at first. You are correct that the 18¾¢ rate paid the cover from Utica to New York City. At New York the post office would put the letter on a sailing ship heading for Liverpool. There were no transatlantic mail contracts at this time, so it was not possible to pay a letter to the destination. When the ship arrived in Liverpool, the ship captain took the letters to the Liverpool post office and was compensated per letter (not sure of the amount in the UK, normally it was 2 cents in the US). The Liverpool Post Office applied the Liverpool Ship Letter marking and rated the letter postage due with a ship letter fee (8d) and an 11d postage rate based on distance from Liverpool to Edinburgh for a total of 1 shilling 7 pence (the black rate squiggle in the center of the cover). As you noted the black ½ rate marking was the Scotland "wheel tax"

Thank you, SPQR! So postage for the portion of the journey from NYC to Edinburgh was paid by the recipient. Review of the Edinburgh directory for 1835 indicates his address was 1 Howe St. (image courtesy of Google):