pierre jaquet-droz, his son henri-louis, and their business partner jean-frédéric leschot built another three automata of equal quality and virtuosity. two of them are, like the writer, more specifically categorised as androids, since they are shaped like humans and actually perform an action instead of simulating it. (the more general term, automaton, can come in any shape — mechanical singing birds, for example were automata that only twitched their beaks, simulating the action of singing while the birdsong came from whistles hidden elsewhere in the mechanical structure.)
these two androids are known as the draughtsman, which can draw pre-programmed images, and the musician, who plays pre-programmed tunes on a customised harpsichord. the level of verisimilitude is incredible, the writer taps his quill to get rid of excess ink before writing, the draughtsman periodically blows a puff of air onto the sheet of paper to remove bits of graphite that might smudge, their eyes follow the movement of their hands etc. the last grand automaton of jaquet-droz was a full-on pastoral scene that included mooing cows, frolicking shepherds, farmers on donkeys, barking dogs and the like, but it's been lost since the late 18th century.
bit of trivia — the draughtsman and the writer both used to have very nicely made shoes to match their rich clothes, but they were removed when being exhibited, to show audiences that the mechanism was entirely contained within the androids and that they were not worked through some massive contraption that led up through their legs. with all the taking off and putting back on, the shoes got lost over the years. they're all on display at the museum of art and history in neuchatel, switzerland.
the jaquet-droz trio made these things as show-off pieces for their watch business and used them to impress wealthy and aristocratic audiences all over europe, to whom they would then sell smaller mechanical objects — watches, singing-bird snuffboxes etc. the modern-day swiss watch company jaquet droz continues in this tradition, making mechanical watches with integrated automata. pretty amazing stuff.
(source of information: i write for and edit a magazine on luxury mechanical watches.)