[4] The formal gardens of Great Fosters were laid out in 1918 by W. H. Romaine-Walker in partnership with Gilbert Henry Jenkins; the pair also extended the house.His epitaph on his monument in Exeter Cathedral states "He departed this lyfe at Forsters nere Egha(m) in Surrey".[5] Although not confirmed by Windsor Castle records, it is said that King George III was treated at Great Fosters towards the end of his life.[5] Early in the 20th century, Great Fosters was owned by Baroness Halkett, Queen Alexandra's lady in waiting.[8] Elizabeth I’s 1598 crest adorns the entryway of Great Fosters and likely marks the year when the queen visited.