third matching instrument, dating from the same period, was donated to Friendsʼ School, Hobart in 1974 by the grandson of Jonathan Backhouse Hodgkin. All three instruments remain in active service. A 5" refractor dating from 1883 is still in use at Coats Observatory, Paisley, Scotland. A 5" refractor dating from 1880 is still in regular use at Clanfield Observatory, Hampshire. There is a 6" Cooke telescope in the Airdrie Public Observatory, Airdrie, North Lanarkshire, Scotland run by the Airdrie Astronomical Association. A 6” Cooke refractor is the main telescope in use at the Hampstead Observatory in London. Known as the ’Wildey telescope’ (in tribute to renowned master optician, Henry Wildey), the telescope can be used by the public on the observatory's open nights (most Friday and Saturdays). There is a 6" Cooke telescope in use at the Baxendell Observatory in Hesketh Park, Southport A 6" Cooke refractor exists in the 1929 observatory of the University of Saskatchewan, Saskatoon, Saskatchewan, Canada, A 6.25" refractor known as the 'Lockyer Telescope' is in use at the Norman Lockyer Observatory in Sidmouth, Devon, UK. The lens, made by Cooke, was first used in 1865 in a telescope built by Norman Lockyer. Cooke later rebuilt the telescope in its present form in 1871. The telescope was positioned in several locations before being moved to Sidmouth in 1912, where it remains. Lockyer used this telescope to discover helium in the solar corona. It was restored in 1995 and is now used mainly for public-outreach. A 6.5" refractor manufactured in 1870 is in use at the Assheton Observatory at Rossall School. A 6.5" refractor manufactured in 1876 is in use at the Astronomic Observatory of the Odessa National University in Odessa, Ukraine. An 8" refractor dating from 1864, known as the Thorrowgood Telescope belongs to the Royal Astronomical Society and is operated at the Cambridge Observatory. An 8" refractor is housed in the Jeremiah Horrocks Observatory, Moor Park, Preston, Lancashire. The Fry telescope, an 8" refractor manufactured in 1862, is in regular use at the University of London Observatory in Mill Hill, London. A 10" refractor from 1860 is in use at the Blackett Observatory, Wiltshire. A 10" refractor from 1871, which was purchased by St. Andrews in 1938 and used as a training telescope, has been in use since 1951 at Mills Observatory, Dundee, Scotland. A 18" refractor was acquired by National Observatory (Brazil) in 1911