"Uncle Tom's Cabin" by Lincoln Logs

Wikipedia and a bunch of other websites, as well as some hardcopy books, all state that the original Lincoln Logs toy, marketed in either 1916, 1918 or 1920 depending on which “source” you read, contained plans that allowed you to build either Lincoln’s Log Cabin, or Uncle Tom’s Cabin. Reportedly, the “Uncle Tom’s Cabin” Lincoln Logs were even the subject of a Final Jeopardy question at one point.

Problem is, I have never seen any evidence of plans, instructions, a picture, an advertisement, or anything supporting the existence of an “Uncle Tom’s Cabin” modeled with Lincoln Logs. There are plenty of old 1920s era sets and plan books on eBay and websites featuring the “Lincoln’s Log Cabin” design, but none showing the other.

Can anyone confirm, preferably with pictorial evidence, that “Uncle Tom’s Cabin” Lincoln Log plans or playsets actually existed? If so, when did the company stop selling it?