The eldest son of John Silverthorn and grandson of Loyalist Thomas Silverthorn, Joseph Silverthorn was one of the first settlers into Toronto Township, Peel County.
On June 16, 1806, Joseph made a land petition as a yeoman of Stamford Township. He had been in the province for about 19 years and was the 21 year old son of John Silverthorn. He was recommended for 200 acres. 
In 1806, Joseph received the location ticket for Lot 11, Con. 1 NDS, Toronto Township. 
On March 17, 1807, Joseph married Jane Chisholm, the daughter of John Chisholm, settled in Toronto Township. 
On November 6, 1807, Joseph received the patent on 200 acres on Lot 11, Con. 1 NDS, Toronto Township. 
He came with his wife, Jane Chisholm, from Stamford Township, Niagara District to settle on this land, Lot 11, Conc. 1 NDS (North of Dundas Street). He later acquired other land as well.
Joseph settled on Dundas Street near the Credit River.
Besides farming as his main occupation, Joseph also operated a saw mill, and was at various times a storekeeper, tailor, shoe-maker and waggonmaker.
On September 13, 1810, Joseph signed a petition as a resident of Toronto Township supporting a land grant by Stiles Stephens who wished to build a saw mill. 
Joseph, along with his brothers Aaron and Thomas served in the War of 1812.
Joseph served as a private in the 2nd York Militia during the War of 1812. From September 22 to October 31, 1813, he served in Captain Thomas Merrigold’s Company. 
On March 24, 1819, Jane Silverthorn made a land petition as the wife of Joseph Silverthorn, a yeoman late of Stamford Twp. and now of Toronto Township. She was the daughter of John Chisholm, a Loyalist of Stamford Township. It was certified that Joseph remained loyal during the late war. Jane had also made a petition as Joseph’s wife on April 16, 1807. 
The Silverthorn farm became known as Cherry Hill, and the house Joseph built in the 1820's to replace the original log cabin is still in existence, the oldest house in Mississauga. It was moved a short distance from its original location, and is operated as a restaurant.
A sketch of the Cherry Hill property, and portraits of Joseph ."and Jane Silverthorn, can be found in the 1877 "Illustrated historical atlas of the County of Peel, Ont."
The 1837 Home District Directory recorded Joseph on Lot 11, Con. 1 NDS, Toronto Township. 
On July 12, 1879, Joseph died at 94 on his farm at Cookville and was buried in Dixie Union Cemetery. 
Joseph and Jane Silverthorn had 12 known children, and possibly two other unnamed children who would have died in infancy. Joseph died at Cherry Hill, and has many descendants still.
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