Interesting story.My Boreman family in America is entirely descended from John Boreman, Paymaster General in the Continental Army. He was an accountant when the War broke out and joined Washington. (See Smithsonian info).
He too was an orphan, sent to live with cockney relatives within earshot of the Bow Bells (St. Mary Le Bow Church) in London. He did not like his treatment there and at fourteen apprenticed himself to the colonies to learn accounting. The rest his history. His seven sons spread the Boreman name from New York, Pennsylvania to Ohio and West. The first Governor of West Virginia and Senator are descendents. He died in theeighteenth century (1830's).
Interestingly, John's official bio says he was a "merchant from Manchester" i.e. a gentleman, when our research in fact showed him an orphan and indentured apprentice. It seems the merchant story was invented to go with his status as a war hero and gentlemanly veteran farmer in his later years.