Títulos
- Racial supremacy being studies in imperialism
- Raffles
- Rampa
- Raphael's astronomical ephemeris of the planets places for 1802
- Raphael's prophetic almanach or the prophetic messenger and weather guide with whitch is...
- A razão experimental
- The "Reason Why" in Astrology or Philosophy and First Principles
- Recent progress in the study of variation, heredity and evolution
- Recherche de la vérité
- Reflexões sobre a língua portuguesa
- O refúgio
- Regeneration
- Regresso ao paraiso
- Regresso ao paraíso
- Reincarnation
- Reincarnation refuted
- Rejected addresses or the new Theatrum Poetarum
- Relampagos
- Relativity
- La religieuse
- Religio medici
- La religion des celtes
- The religion of Shakespeare
- Religious history of Japan
- The remarkable adventure of Walter Trelawney parish prentice of Plymouth in the year of the Great...
- The Renaissance
- Report on moral instruction and on moral training [in 18 countries]
- The republic of Plato in ten books
- Res non verba
- Ressurgir
- Ressurreição
- Resumo da história das religiões
- Revaluations
- La rêverie esthétique
- Les rêveries du promeneur solitaire en dix promenades
- The revised latin primer
- A revolução portugueza, 1907-1910
- Revue des deux mondes
- Rimas da noite e da tristeza
- The ring of return
- Rolling stones
- Romance de Inez de Castro
- Romans
- Romans et contes
- Les romans grecs
- Le romantisme français
- A romaria
- Rome
- Rome from the earliest times to the end of the Republic
- Rompendo fogo...
- A ronda da noite
- Ronsard
- Root - Principles in Rational and Spiritual Things
- A rosa de papel
- As rosas
- The rose immortal
- The rosicrucians their rites and mysteries
- Roteiro das saudades
- Roteiro do 1.º cruzeiro de férias às colónias
- The Royal Carl Rosa Opera Company
- Rubáiyát of Omar Khayyám
- La rueda de color
- Russian literature