 Sir Philip's (illegitimate) only daughter, Caroline Elizabeth, married Thomas Jones, 6th Viscount Ranelagh in 1804, but died in childbirth the next year without surviving issue; she was buried in the same vault in Fulham church.With no living descendants, Sir Philip bequeathed his entire estate to Viscount Ranelagh.During his 32 years as Secretary to the Admiralty, Stephens was one of the most powerful men in Britain.