When shown the list of personnel who died in mining accidents, one of the names is Roy Huggins ("died in an explosion"). This is the name of the series' producer.
Per the title, in 1859 the Comstock Lode was the first major U.S. deposit of silver ore, discovered under what is now Virginia City, Nevada.
The aerial view of the Horne Ranch is also used as the De La Vega Hacienda on the series "Zorro".
The tunnel proposed in this story is likely modeled after the real-life Sutro Tunnel in Virginia City.
Roy Huggins would frequently borrow from Maverick when producing stories for his later TV shows.
The "cut the Ace of Spades" trick would be reused in The McCreedy Bust (1971).