After travelling throughout Pennsylvania in the 1850s, the year 1863 found him in Washington, D.C., where he may have worked on the new United States Capitol dome.
At that time, the City Directory listed him as a painter and it is likely that he mostly painted signs, wagons and furniture.
His other inventions include a hat rack, a "feather renovator" for cleaning the stuffing in pillows and mattresses, and a vegetable peeler (he was a lifelong vegetarian).
[1] No record of any formal artistic training exists and it appears that he did not begin painting individual pictures until late in life; possibly after he retired.
[2] Park was a lifelong vegetarian and adhered to the diet through the American Civil War as a soldier in Company F of the 2nd District of Columbia Infantry Regiment.