Description: The Heathen Deities, Jupiter Tonans by Mr. Rawbuck and Mars by Mr. Moreline, who will grin through a Horse Collar. Grinning through a horse collar is a reference to an early nineteenth century game. The phrase is used as an expression indicating poor, low humour, or lack of wit. Poster references C. Hunt, Mr. Rawbuck, Mr. Moreline and Mr. Smythbourne. C. Hunt printer.