Bookseller Trade Cards - Die-cut Fans

Several weeks ago, there was a discussion introduced on the Ephemera Network about business cards. Frank DeFreitas, whose holography specialty of ephemera is found at Antiquarian Holographica , invited participants to join the group Business, Trade & Calling Cards and to share examples. I submitted the card below from Thomas W. Durston, Bookseller, of Syracuse, New York. I have found references to Durston's book shop in the 1880s, so the card dates from about that time to possibly the turn-of-the-century. This is a die-cut piece of ephemera, which means a press was used with a specialized cutting tool (die) to cut and create the fan shape from the paper used for the card. I have two more of these from the same bookseller, only in different colors: The ubiquitous bookseller symbol, the owl, is present in the design, but this one is holding or playing what looks like a mandolin. I'm not sure what that represents, nor am I sure about the fishing frog's role in represen...