City to Troy''',; Watson & Co., 1891). This great work of cartography was issued in 35 separate sheets, each approximately 30" x 20". Each sheet shows a different section of the Hudson River measuring from four to five miles north to south, together with a view of approximately four miles east to west on either side of the Hudson. Each sheet identifies the owners of the various estates and properties and outlines their approximate dimensions. Garrison is shown on Sheet 12, and it identifies Oulagiskat, Wyndune, and the Walker House, except that the Walker House is listed as that of W. S. Sloan, which is consistent with the Duryee biography's use of 1894 as the date of transfer of the house by Sloan to the Walkers. Section 12 also shows the Osborn estate immediately south of the Sloan estate, with the Fish estate below that and Cragston, the great 700 acre J.P. Morgan estate across the river and to the south. When built, the Walker House was located on the large Sloan family summer estate, together with Oulagisket, Wyndune, and numerous supporting buildings. The original Sloan estate has been divided over the years; its various out-buildings have all been converted to residential use; and all are now under separate ownership. According to the Duryee biography, Sloan had built the first summer house on his estate for his daughter, Maria, in 1872, following her marriage to Edgar Stirling Auchincloss. Its location on the Sloan estate is not otherwise described by Duryee, and he refers to it only as the "Auchincloss Cottage." The house remained in the Walker family until 1956, when it was sold to Walker O. and Abby H. Cain. Walker O. Cain (no known relation of Joseph Walker), a prominent twentieth-century architect, practiced at McKim, Meade & White, which firm was ultimately succeeded by his own firm, Walker O. Cain Associates. Since the house had been a summer residence when owned by the Walkers, modern mechanical services were added to the house after the 1956 sale to make it usable year-round. The house was later sold again in 2000 and then in 2005. Following both the sale in 2000 and that in 2005, the house was extensively renovated and updated. In 1978, the railing from the widow's walk on top of the roof was removed because of its general deterioration, but kept in storage for possible future restoration. The