Sources

1) Source: The History of Parliament . External Link
http://www.historyofparliamentonline.org/volume/1386-1421/member/danvers-john-1449. Reference: Danvers, John (d.1449), of Calthorpe in Banbury and Prescote in Cropredy, Oxon. (Questionable reliability of evidence)
2) Source: Memorials of the Danvers family (of Dauntsey and Culworth): their ancestors and descendants from the conquest till the termination of the eighteenth century; with some account of the alliances of the family and of the places, where they were seated. Reference: Page 102 (Data from secondary evidence)
3) Source: Memorials of the Danvers family (of Dauntsey and Culworth): their ancestors and descendants from the conquest till the termination of the eighteenth century; with some account of the alliances of the family and of the places, where they were seated "To return to Richard Danvers. Born about the year 1330, or a few years later". Reference: Page 92 (Data from secondary evidence)
4) Source: Memorials of the Danvers family (of Dauntsey and Culworth): their ancestors and descendants from the conquest till the termination of the eighteenth century; with some account of the alliances of the family and of the places, where they were seated "John Danvers cannot have been born later than the year 1382, as in the year 1403 he is of age to join his father in giving a charter". Reference: Page 95 (Data from secondary evidence)