- FondsMordell - Papers of Louis Joel Mordell
- Series1-40 - Letters
- File32 - Todd
- Item32.1 - A.L.s., from Princeton
- Item32.2 - A.L.s., from Princeton
- Item32.3 - A.L.s., from Princeton
- Item32.4 - A.L.s., from London Mathematical Society
- Item32.5 - A.L.s., from Cambridge
- Item32.6 - Copy of a letter from LJM to 'Dear Todd'