Sir Dugald Clerk KBE, LLD FRS was a Scottish engineer who designed the world's first successful two-stroke engine in 1878 and patented it in England in 1881. He was a graduate of Anderson's University in Glasgow, and Yorkshire College, Leeds. He formed the intellectual property firm with George Croydon Marks, called Marks & Clerk. He was knighted on 24 August 1917.

Ewhurst is a rural village and civil parish in the borough of Waverley in Surrey, England. It is located 8.3 miles (13.4 km) south-east of Guildford, 2 miles (3.2 km) east of Cranleigh, and 4.5 miles (7.2 km) south of Shere.