“Robert Isham Clerk, ob. 5 Maii 1564, seized of a moiety of Lamport” is shown in an extensive family tree in The History of Northamptonshire. [Peter Whalley, (1791). The History and Antiquities of Northmaptonshire Compiled from the Manuscript Collections of the Late Learned Antiquary John Bridges, Esq., Volume II, page 112.]