did he have kids?
Yes, Margaret.
Robert Sterling Yard
 In 1895, he married Mary Belle Moffat; they had one daughter, Margaret.

who is robert sterling yard? American writer, journalist, and wilderness activist. where was he born? Haverstraw, New York. was he married? Yes, married Mary Belle Moffat.
wiki:22583591
Robert Sterling Yard [SEP] Early life and career
After serving as editor of Charles Scribner's Sons' the "Book Buyer", Yard helped launch the publishing firm of Moffat, Yard and Company. He served as vice president and editor-in-chief of the firm.