necessity
| Author(s) | Title | Reference | |
|---|---|---|---|
| G.L. Harriss | Robert Winchelsey and the Crown, 1294-1313, by Jeffrey H. Denton | 52/1, p. 185 |
| Author(s) | Title | Reference | |
|---|---|---|---|
| Myra Stokes, John Scattergood | TRAVELLING IN NOVEMBER: SIR GAWAIN, THOMAS USK, CHARLES OF ORLEANS AND THE "DE RE MILITARI" | 53/1, p. 78 |