to "keep it in [her] heart for consideration, for it appeals to me tremendously". By this point the chosen site was within the rapidly-growing city's lit areas, and no longer suitable for astronomy. A site much further from the city was needed, to ensure it too would not be crowded out. The first site studied was outside Aurora, Ontario, but it was decided that it was too far from the university for casual travel. Another site near Hogg's Hollow was also studied, but was not easily accessible. The eventual site was selected while Chant was studying topographical maps with fellow astronomer Reynold Young, finding a suitable spot north of the city. The site was a short distance east of Yonge Street, and the Canadian Northern Ontario Railway line ran along the western end of the site. It was on lot 42 on what was Alexander Marsh farm and orchard. When Chant took Dunlap to see the site for the first time, she stated "this is the place!" and authorized its purchase for C$28,000. Construction Chant immediately started ordering a telescope, selecting a instrument from Grubb, Parsons and Company in England. This would make it the second-largest telescope in the world, second only to the instrument at Mount Wilson Observatory. It was, however, only slightly larger than the one that had recently gone into service for the Dominion Astrophysical Observatory in British Columbia, at . The observatory building itself started construction, and the eighty-ton sixty-one-foot (18.6 m) copper dome was built by Grubb and Parsons in 1932 and arrived in 1933. The administration building, a few hundred feet from the main observatory, also started construction and designed by Mathers & Haldenby Architects. The mirror blank (the two outermost inches (5 cm) of the mirror are not used) was supplied by Corning Incorporated and cast in Pyrex from a batch of glass that Corning also used to produce the mirror for Palomar Observatory. Chant and Mrs. Dunlap attended the pouring of the mirror at the factory in Corning, New York in June 1933. The mirror was annealed, then shipped to Grubb-Parsons in England for polishing. The telescope was completed in time for the finished mirror's return in May 1935. The official opening was on 31 May 1935, Chant's 70th birthday. The opening ceremony was attended by notables including Sir Frank Dyson, former Astronomer Royal, and former Prime Minister William Lyon Mackenzie King,