Muriel Powell (charity administrator) explained

Muriel Powell (1889–1972), often referred to as Matron Powell, was the successor to Dame Grace Kimmins in the Chailey Heritage School and was the founder of Searchlight which continued the work of the Chailey Heritage School for students from age 15 into adulthood.^[1]

From 1924 until her resignation in 1933, Powell was Matron of the Chailey Heritage Marine Hospital, at Tide Mills, East Sussex.^[2]

Notes and References

1. Web site: Hospital where seawater poured into the wards. Lewes Today. Kevin Gordon. 14 December 2006. 7 February 2007. The children had a variety of disabilities from blindness to loss of limbs but all were subject to the same strict regime enforced by the matron, Muriel Powell. The hospital must have been freezing to live in during the winter and ex-pupils remember sea water pouring into the wards during winter high seas and hurricane lamps having to be used..
2. Book: Notable Sussex Women: 580 Biographical Sketches. 978-1-904109-15-0. Hastings Press. Helena Wojtczak. 1 June 2008.