found: Shakespeare, W. Henry V, 1982:dramatis personae (Richard, Earl of Cambridge)
found: Wikipedia WWW site, viewed Aug. 18, 2004(Richard, Earl of Cambridge, b. ca. 1375 at Conisborough Castle in Yorkshire; d. August 5, 1415; younger son of Edmund of Langley; grandson of King Edward III of England; plotted treason against King Henry V; stripped of all his titles and estates and executed at Southampton)
found: Rulers of England WWW site, viewed Aug. 18, 2004(Richard Plantagenet, Earl of Cambridge, b. Conisborough Castle IX.1376; beheaded on Southampton Green 5.8.1415)
found: Tudor Place WWW site, viewed Aug. 18, 2004(Richard Plantagenet of Conisburgh (3rd Earl of Cambridge); b. ca. Sep 1376, Conisburgh Castle, Yorkshire, England; acceded 1 May 1414; d. 5 Aug 1415, Southampton Green, Southampton, Hampshire, England; beheaded for conspiring against Henry IV [sic])
found: Morgan family genealogical WWW site, viewed Aug. 18, 2004(Richard, Prince of England, Earl of Cambridge; b. ca. Sep 1376 at: Conisbrough Castle, Yorkshire, England; d. 5 Aug 1415 at Southamptongreen, Southampton, Hampshire, England)
found: Some corrections and additions to the Complete Peerage, Vol. 2:p. 494 (Richard, styled "Of Conisburgh" or "Of York," 2nd son of Edmund, Duke of York and Earl of Cambridge, by his 1st wife, Isabel, da. and coh. of Pedro, King of Castile and Leon; b. at Conisburgh Castle, co. York, about 1375; b. at Conisborough castle, T.B. Pugh speculates that he was born probably shortly before Richard II's arrival at York on 20 July 1385; also the child may have been fathered on the Duchess of York by John Holland, Earl of Huntingdon)
found: The Golden Falcon WWW site, viewed Aug. 18, 2004(the Duke of York's brother Richard, earl of Cambridge; m. the sister of Edmund Mortimer, earl of March; executed in 1415)
found: RootsWeb.com WWW site, viewed Aug. 18, 2004(Richard Earl of Cambridge, b. 1378)