Trusty and welbeloved we grete you wele and late you wite that certeyn of yor breþeren aldermen of our cite of London hath shewed unto us by þe declaracõn of your Recorder of þe good diligence that ye entended to have put you in to þe performyng of our commandement yeoven unto you by our lettres of prive seal in case our said lettres had come unto you in convenable tyme as for tharrest and attachement to have be made of certeyn shippes and persones þat late in our Ryver of Thamyse made gret attemptatz ageynst our ligue and sauf conduct of þe which yor goode disposicioun and benivolence we hold us wele content and can you þerfore right goode thankes charging you that if it hapne any of þe said shippes or mysdoers to repaire herafter unto or saide citee or unto þe franchise þerof that thenne ye doo put them undre arrest and to be kept in sure warde abiding the determinacon of our lawes the which we wol in all wise be executed. And over this we charge you in yor effectuel devoir to see that our peas be kept at alle tymes within our saide citee And if any misgoverned persone of what estate or condicioun so ever he be make any stiring riot or attempt any thing to þe breche of or paix within oure saide citee and franchise of þe same þat thenne ye doo yor peyne to suppresse them and to put hem in warde and so þat they be duely punisshed according to their demerites. In which thing doyng ye shal mynistre unto us cause of grete plaisir and deserve of us þerfore right good and especial thanke in tyme to come. Yeven under our signet at or Castell of Kenelleworth the xxij daye of Marche. No. 20. Letter from the City to Henry VI, touching the capture of Sandwich by the French. Dated 3 Sept. [1457]. Letter Book K, fo. 292.