MASKELYNE, J.N. (1839 – 1917). John Nevil Maskelyne Mourning Card. Postmarked May 25, 1917 on the retained upper portion of the original mailing cover. A black-bordered folding card issued from St. George’s Hall, Langham Place, announcing: “The family of the late John Nevil Makselyne return their sincere thanks for kind sympathy in their sad bereavement.” 6 x 3 7/8” (open). RARE.