'Tullaroan', the Joseph Peter Grace Sr. estate designed by James O'Connor c. 1910 in North Hills (I do not know why it is listed as Glen Cove in the pictures). J.P. Grace was president and chairman of the board of W.R. Grace & Co. The estate had Olmsted landscaping and alterations by Horace Trumbauer in 1917. Grace was married to Janet Macdonald, daughter of Charles B. Macdonald who resided at 'Ballyshear' in Southampton. In 1954 the estate became the Deepdale Golf Course with the main residence becoming the clubhouse. Click HERE to see 'Tullaroan' on google earth and HERE on bing.