William Henry Edgcumbe, 4th Earl of Mount Edgcumbe, GCVO, PC, DL, styled Viscount Valletort between 1839 and 1861, was a British courtier, Conservative politician, and Volunteer officer.

Plymouth was a parliamentary borough in Devon, which elected two members of parliament (MPs) to the House of Commons in 1298 and again from 1442 until 1918, when the borough was merged with the neighbouring Devonport and the combined area divided into three single-member constituencies.