Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 134,016 pages of information and 212,992 images on early companies, their products and the people who designed and built them.
In 1862, Mr. Wilkinson, of Ashford, Kent, possessed a small steam carriage with two direct acting cylinders each 4.5in. diameter and 12in. stroke. The driving wheels were 5ft. diameter. Steam of 120lb. pressure was supplied by an ordinary vertical boiler. 
Presumably this refers to Thomas C. Wilkinson of Ashford, Kent