An undated inventory (RGO6/54/14–18), post 1818, but seemingly taken before 1821, lists the clock. The listing is a later insertion and although it appears to have been tagged on to the end of the Quadrant Room lisiting, it may in fact be at the start of that for the Enlarged Room.
The 1824 inventory (RS MS/371/70) lists it in the Enlarged Room
The 1831 inventory (RGO64/37) lists it as being in the Advanced Building
The 1840 inventory (RGO39/1/11) lists it as being in the Advanced Building, with a note that it was in good condition in 1841