ly ▁Roger ▁Mort imer , ▁and ▁placed ▁in ▁the ▁joint ▁cust ody ▁of ▁Mort imer ’ s ▁son - in - law , ▁Thomas ▁de ▁Ber keley , ▁and ▁de ▁Ber keley ‘ s ▁brother - in - law , ▁John ▁M altra vers . ▁They ▁brought ▁Edward ▁to ▁Ber keley ▁Castle , ▁and ▁held ▁him ▁there ▁for ▁five ▁months ▁from ▁April ▁to ▁September . ▁During ▁that ▁time ▁a ▁band ▁of ▁Edward ' s ▁supp or ters ▁attacked , ▁entered ▁the ▁castle ▁and ▁res cu ed ▁him , ▁only ▁for ▁him ▁to ▁be ▁re capt ured ▁soon ▁afterwards . ▁It ▁is ▁possible ▁that ▁his ▁capt ors ▁then ▁moved ▁him ▁around ▁between ▁several ▁cast les ▁to ▁make ▁further ▁rescue ▁more ▁difficult , ▁before ▁returning ▁him ▁to ▁Ber keley ▁Castle ▁in ▁September . ▁Some ▁comment ators ▁have ▁claimed ▁that ▁Edward ' s ▁escape ▁was ▁actually ▁successful , ▁and ▁that ▁someone ▁else ▁was ▁later ▁murder ed ▁in ▁his ▁place . ▁ ▁Historical ▁sources ▁record ▁that ▁Edward ▁was ▁murder ed ▁there ▁on ▁ 2 1 ▁September ▁ 1 3 2 7 . ▁Rap ha el ▁Hol in sh ed ' s ▁Chron icles ▁( 1 5 8 7 ▁edition ), ▁drawing ▁on ▁earlier ▁sources , ▁describes ▁Edward ' s ▁murder ▁in ▁detail : they ▁[ the ▁murder ers ] ▁came ▁sudden lie ▁one ▁night ▁into ▁the ▁chamber ▁where ▁he ▁la ie ▁in ▁bed ▁fast ▁as l ée pe , ▁and ▁with ▁he au ie ▁fe ather bed s ▁or ▁a ▁table ▁( as ▁some ▁[ s ources