Information about the company is thin on the ground, but there are these adverts from 1876 in Iowa and New York newspapers:
Quad-City Times from Davenport, Iowa (17 February 1876)
A mouse will not draw a long train of cars, neither is one twenty-five cent bottle of Laycock's Worm Killer always enough to expel worms from a grown person, although it has often done so. But it is acknowledged by all who have used it to have no equal as a worm medicine. All mothers should keep it in the house. Sold by all druggists.
Quad-City Times from Davenport, Iowa (23 Feb 1876)
The Rising Generation Have discovered two facts. They have found out that Laycock's Worm Killer expels worms “thoroughly” without pain, frees the system from all impurities, and restores health and vigor to the sick. They have also found out that Laycock's worm killer is superior to and more palatable than worm candies and vermifuges. Ask for Laycock's Worm Killer. Sold every where.
Red Hook Journal from Red Hook, New York (28 April 1876)
Both a difference and a distinction. While the vermifuges and LAYCOCK’S Worm Killer are both used for the purpose of expelling worms, Laycock's Worm Killer is much safer, and more palatable than either vermifuges or worm candies. Besides expelling worms, Laycock's Worm Killer regulates the bowels and cleanses the system. Ask lor Laycock's Worm Killer. Sold by all druggists.
That last ad also appeared in the Adams County Free Press newspaper from Corning, Iowa on 14 April 1880.
