On what grounds does this 15,000-square-foot estate deserve the designation of a "true Manor House," which the listing oh so enthusiastically bestows upon it? For starters, there's its 2.7 acres of grounds designed by Olmsted Brothers, the firm founded by the sons of Central Park co-designer Frederick Law Olmsted, who carried on the legacy of their famous father with an influential landscape design firm of their own. Their work, often mistakenly attributed to their father, graces more than a few mansions of this size and era; here it complements "every luxury you would expect of a Manse of this caliber," including 10 bedrooms, "baths done with the most exquisite stonework," "bays with grouped leaded casements and chamfered stone mullions," "molded lintels" with "stone finials and gabled parapets," "Heraldic emblems" at the center of "stunning diamond light casements," and "15th Century linenfold paneling and wood carvings" by Dutch-British sculptor Grinling Gibbons. Built by Goodwillie and Moran in 1929, Stone Eagles (also known as the Mochary House) was added to the National Register of Historic Places in 1988. It last sold in 2003 for $3.4M, and is currently on offer for $5.25M, brought down a tad from its April 2013 ask of $5.875M.