What nationality was the man in whose shops Henri Maillardet spent a period of time?
Henri Maillardet:  He spent a period of time in the shops of Pierre Jaquet-Droz, who was in the business of producing watches, clocks, and automata. Pierre Jaquet-Droz: Pierre Jaquet-Droz (] ; 1721–1790) was a Swiss-born watchmaker of the late eighteenth century.
Swiss