1Enclosure: Ferdinand R. Hassler’s List of Scientific lnstruments Procured for the United States Coast Survey, November … (Jefferson Papers)
General List of Mathematical Instruments and Books, destined for the survey of the Coast of the...
2Enclosure: Ferdinand R. Hassler to Robert Patterson, 2 December 1816 (Jefferson Papers)
M rs Hassler told me You had mentioned her last Summer that it was desired a good Watchmaker...