Voyage fait par ordre du roi en 1768, pour éprouver les montres marines inventées par M. Le Roy

"The author (1748-1845) was the fourth generation of a family of Italian-French astronomers, all of whom were directors of the Paris observatory. This work depicts Le Roy's voyage to collect astronomical data, as well as information about St. Pierre and the French fishery off the coast of Newfoundland. Le Roy traveled from France to St. Pierre, returning via the coasts of Africa, Spain, and Portugal. In addition, Le Roy's chronometer, the prototype of the modern instrument, is described for the first time... Cassini also recounts in great detail the practice of catching and salting cod off the banks of Newfoundland." (Kahn catalogue.