Donald McGill was one of the most significant post card artists at the time covered by this study, and I have created a page giving examples of his work for various publishers.
This card, shows a mother with a pram, has no signature or publisher but is in "Series 3097" along with other cards that are very probably by "F S."
This card was published by Vertigen and shows an aeroplane flying over the sea. It was posted in October 1910, a year after Louis Bleriot had flown across the English Channel
This card, by Dauber. replaces an earlier version where the image was partly obscured by a printed Christmas message