From this starting point Ritchie amassed a distinguished collection of modern Scottish art, including examples by Fergusson’s fellow Scottish Colourists F. C. B. Cadell and S. J. Peploe and Fergusson’s wife Margaret Morris, as well as many other leading artists of the twentieth-century including John Bellany, Elizabeth Blackadder, Robert Colquhoun, Joan Eardley, William Gillies, Robert MacBryde, William MacTaggart and Robin Philipson.
It is thought that Ritchie acquired Place de l’Observatoire when it was included in Fergusson’s last lifetime solo exhibition, held at the Annan Gallery, Glasgow in 1957. It consisted of 43 paintings, covering the artist’s career from Tandstickers (Toothpicks) of 1898 to the recently completed Fruit and Flowers at ‘La Fauvette’ of 1957. Place de l’Observatoire was number 33 and can be seen in installation photographs of the exhibition, held in the Fergusson Archive of Culture Perth & Kinross. It was presented in a similar, if not the same, frame as it is currently, as part of an arrangement of six paintings, including the related Boulevard Raspail of 1907, A Pink Rose of 1902 and images of Royan and Cassis.