In 1868 Sir Geroge Biddell Airy published a paper in the Monthly Notices of the Royal Astronomical Society  setting forth plans he and the Hydrographer of the Navy had developed for the British ToV expeditions of 1874 and 1882. It is those plans, and this and similar maps which Richard Proctor attacked. Note the possible Canadian ToV observaing stations on the map. This copy is from the relatively rare Correspondence Between the Treasury, the Admiralty, and the Astronomer Royal, Respecting the Arrangements to be Made for Observing the Transits of Venus, Which Will Take Place in the Years 1874 and 1882 printed in the House of Commons Parliamentary Papers XLVII (1869). Image courtesy of Specula astronomica minima (©Specula astronomica minima).