- Penck, A. R.,--1939---Autograph1
- Petrovsky, Wolfgang,--1947---Autograph1
- Phillips, Tom, 1937-1
- Poor, Daniel1
- Pope, Alexander,--1688-17441
- Pope, Alexander,--1688-1744--Ms. notes1
- Pulteney, Sir William, 1729-1805--Correspondence1
- Ramus, Petrus, 1515-15721
- Rehfeldt, Robert,--1931---Autograph1
- Rhenanus, Beatus, 1485-15471
- Rizzi, Silvio--Ownership1
- Robinson, Boardman,--1876-1952--Autograph1
- Runft, Thomas--Autograph1
- Rutherforth, T.--(Thomas),--1712-17711
- Saveall, Solomon1
- Schimansky, Hanns,--1949----Autograph1
- Schlegel, Christine,--1950---Autograph1
- Scoggin, Glo.--Autograph1
- Secker, Thomas, 1693-1768--Correspondence1
- Shakespeare, William,--1564-16161
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