Lots of article online about Alexander & Jessie Milne, his business interests, etc.- here are just a few examples:
http://fultonhistory.com/obituary N.Y. Herald, 2 Aug.1915 (Alexander born Montrose, Scotland, to U.S. 1869)
lots of golfing articles
obituary Yonkers Statesman, 3 Aug.1915
longest obituary Eastern State Journal, 7 Aug.1915
value of estate Dobbs Ferry Register, 28 Jan.1916
1880 census- N.Y.: Alexander Milne, wife Mary J., children Eliza A. & Jane
https://familysearch.org/ark:/61903/1:1:MZ6Z-NSX