They had two sons, the elder of whom was the author Hugh Walpole, and a daughter.
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In 1882 Walpole married Mildred Helen (1854–1925), daughter of Charles Foster Barham.
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The eldest of his three children was the novelist Hugh Walpole.
Somerset | Bath, Somerset | Horace Walpole | Somerset County Cricket Club | W. Somerset Maugham | Robert Walpole | Somerset House | Edward Seymour, 1st Duke of Somerset | Somerset County | Duke of Somerset | Wells, Somerset | North Somerset | Wellington, Somerset | Somerset West | Somerset Island | Hugh Walpole | Camerton, Somerset | Bath and North East Somerset | William de Mohun of Dunster, 1st Earl of Somerset | Walpole | Somerset Maugham Award | Somerset County, New Jersey | Portishead, Somerset | FitzRoy Somerset, 1st Baron Raglan | Somerset Light Infantry | Somerset Island, Bermuda | Somerset County, Maryland | Edward St Maur, 11th Duke of Somerset | Cannington, Somerset | South Somerset (UK Parliament constituency) |