Letter from Robert Lewis John Ellery, Melbourne Observatory to Edward Sabine Ellery received the unifilar and dip circle from Mr Adie, has made the necessary arrangements and will commence a series of observations ‘for relating the results of the old instruments of Lamont’s with those obtained by the new’ instruments. Ellery has £360 for self-registering instruments and would like Mr [Balfour] Stewart to order them for him. 25 January 1866