1. B.I. ABP Reg. 19: Borthwick Institute of Historical Research; Archbishop Kemp's register, 1428
2. B.I. ABP Reg. 22: Borthwick Institute of Historical Research; Archbishop Neville's register, ff. 40r–47v
3. B.L. Egerton MS 2827: British Library manuscripts department; Cartulary of St Agatha's, Easby
4. NYCRO: ZNK I 1/2015: North Yorkshire County Record Office; archive of Dundas of Aske
5. NYCRO: ZRL: North Yorkshire County Record Office: archive of the Lawson family of Brough