In 1346, Richard de Acton had as his ward Walter Perceval, in the manor and lordship of Exford.
(Forests & Deer Parks of the County of Somerset by William Henry Parr Greswell. 1905. Page 160.)
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... of Richard de Acton by reason of the custody of the lands of Walter Perceval, under age, grandson and heir of the lady Joan Perceval, deceased.
(The Register of Ralph of Shrewsbury, Bishop of Bath and Wells, 1329-1363. 1896. Page 528.)
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... as to the state of the forest held at Wells in June, 1362, that Richard de Acton was then the warden of Exmoor, one Ralph Perceval being his deputy.
(The History of the Forest of Exmoor, by Edward Terence MacDermot. 1973. Page 168.)

1. Alice De Acton b: ABT 1325