http://www.mwcc.edu/gardnerfurniture/BriefHistory.htmC. H. Hartshorn, Inc.
"Founded: C. H. Harshorn began the company in 1893, after working for 13 years for the Heywood Company.
Products: He began making hand-woven reed chairs at a small plant in South Gardner, but soon moved to a larger space in Union Square. In 1907, when the company began making woven reed baby carriages, Mr. Hartshorn built a four-story factory near the Cheshire line of the Boston-Maine Railroad.
Products: In the 1920s the company began using woven fiber for its reed seats. It made upholstered maple living room furniture, dinette sets, children’s rockers and fiber baby strollers.
The company closed in 1993."
There were many furniture manufacturer's in Gardner Mass. so i wouldnt be real quick about tossing your wicker sofa. There are dealers/sites that specialize in wicker stuff so i'd check there first.