I've found that in Porter's Directory of 1889, in a list of Freemason Lodges and Officers for the year 1888-9, P.C. Steward - Bro William H. Wylde J.D. appears in Athole Lodge No. 1004.
I now see that J.D. most probably stands for Junior Deacon and it could well be that this William H. Wylde and William Henry Wylde the second husband of Margaret Little are one and the same.