Former Owner
- Raoul Chandon de Briailles1
- Raphael Nathan Nata Rabinowitz1
- Reiss & Son1
- Reuschenberg, Margreta von1
- Richard Ashurst Bowie1
- Richard McKeon1
- Richarde H Ffrancis, fl. ca. 16th c.1
- Robert B. Honeyman1
- Robert Benson, fl. Ca, 18th c.1
- Robert Garrett1
- Robert Ranshaw1
- Robert Samuel Turner1
- Robert Treswell1
- Robert Walker1
- Robert de Mol1
- Rudolphus Rasser Donatus1
- Sam Fogg Rare Books & Manuscripts1
- Samuel Allan1
- Samuel H. Putnam1
- Samuel Putnam Avery1