Mrs. Sourgrapes (which on this example omits the S) had a short run in the Philadelphia North American Sunday section from June 25 to September 24 1911. It was often left unsigned, but a few strips are signed “Newton-Horn”. I don’t know who that is, and no one by that moniker shows up elsewhere in my files. I’m going to take a guess, though, and say that it was probably a female cartoonist. We’ve discussed before how the North American was a remarkably open newspaper to women cartoonists.
If it’s not obvious from the context in this sample, the hobble skirt of the 1910s was a floor-length skirt that was so tight at the bottom that it made it impossible for women to take a full walking stride. It was considered the height of fashion for a time until women wised up that the garments were exceedingly uncomfortable and impractical. You’d think the corsets were enough of a cross to bear. Here’s a link to a site that gives a short history of the hobble skirt.
This strip was among those that were reprinted by World Color Printing in their sections, and Mrs. Sourgrapes made a brief reappearance there in 1915.