Henry Walter Molyneux Sarel used the name Walter Sarel in his professional career as an architect. Seven architectural commissions had some involvement by Gertrude Jekyll in their garden layouts or planting schemes. There are also a few sites where he is said to have designed gardens contemporary with his architectural work. His first known architectural work was in 1904, a very modest addition to a house, but he was soon to be designing substantial houses for well-off clients. At his death in 1941 he was living in Chester Square, London.