The article about a ship carrying goods sounds very plausible. He was documented to have imported from Holland.

John Wharton of Accomack was also a wealthy lawyer so may have been involved with a bokerage house. I will have to do further research to be sure there wasn't another John Wharton in Philadelphia at that time. John Wharton of Accomack doesn't seem to related to the Whartons of Philadelphia.
Thank you so very much for your help.