John Davis, travelling from England, worked for a few months as a tutor to Nathaniel Ellicott's (1763–1841) children at his home Rockledge and two mills. He "was nearly stunned by the noise of two huge mills, whose roar, without any hyperbolical aggravation, is scarcely inferior to that of the great falls of the Potomac, or the cataract of Niagara."
Nathaniel was the son of Andrew Ellicott (1733-1809), one of the founders of Ellicott City, and brother of George Ellicott (1760-1832) whose house is opposite the old EC mill on the Patapsco River. All three are buried in the Ellicott family cemetery in Ellicott City.
