Títulos
- Sáchá
- Sailor's knots
- Saint Joan
- Saint-Martin
- Salammbô
- Salazar (António Ferro) [9-75]
- Salazar (António Ferro) [9-74]
- Salthaven
- Santa Rita Pintor
- São João subiu ao trono
- Sartor resartus
- Satan-Dieu
- [Satyricon, fragments and poems]
- The Saxon and the Celt
- Sayings of the Jewish fathers comprising Pirqe Aboth in Hebrew and English notes... and a Cairo...
- Scarron
- Scènes de la vie russe
- A school atlas of English history
- Science and Speculation
- Science and the infinite or through a window in the blank wall
- Science et religion dans la philosophie contemporaine
- Scientific phrenology
- The scottish workings of craft masonry, complete and accurate
- The sea lady
- Le secret de Nostradamus et de ses célèbres prophéties du XVIème siècle
- Secret Shakespearean seals
- Se Gil Vicente voltasse...
- Selecta portuguesa compilada, annotada e com referências numerosas à gramática portugueza do Sr. A....
- Selected essays 1884-1907= 1884- 1907
- A selection from the poetry of W. B. Yeats
- Selections from the british satirists
- Selections from Treischke's lectures on politics
- Select poems
- Sempre
- Seneca's tragedies
- A senhora da melancolia
- Senhora da noite
- Sensuais
- Os sentidos e a emoção nalguns poetas portuguezes e brasileiros
- Seven essays selected from the works of Herbert Spencer
- The shadow of the wolf
- Shadows cast before
- Shaken creeds
- Shakespeare et la superstition shakespearienne
- The Shakespeare problem restated
- She
- Shelley
- A shilling for my thoughts
- Shipping
- Ship's company
- Short cruises
- A short history of christianity
- A short history of England
- A short history of freethought
- A short history of war and peace
- The short stories of H. G. Wells
- Sidónio Pais
- The Sikandar Nama, e Bará
- The silver box and other plays
- Os simples (Guerra Junqueiro) - 5ª ed [8-627MN]
- Os simples (Guerra Junqueiro) - 5ª ed [8-290]
- O sinal da sombra
- Sketches from Eastern history
- Slayers of superstition
- The Sloan-Duployan phonographic instructor
- Social change
- Le socialisme en 1907= 1907
- The socialist movement
- Social statics abridged and revised
- Sociedades secretas
- La sociologie de Proudhon
- Sodoma divinisada
- The solar epoch
- Le soleil
- Soluções críticas
- As sombras (Teixeira de Pascoaes) - 2.ª ed [8-642]
- As sombras (Teixeira de Pascoaes) [8-420]
- La sombrilla japonesa
- Some account of the writings and opinions of Clement of Alexandria
- Sonetos (Camões) [8-601MN]
- Sonetos (Carlos Frederico Parreira) [8-640]
- Sonetos (Candido Guerreiro) [8-240]
- The song of honour
- Sous la lampe
- Sous le masque de "William Shakespeare"
- South Africa past and present
- Un souvenir d'enfance de Leonard de Vinci
- The Spectator
- The sphinx unveiled
- Le spiritualisme et l'ideal dans l'art et la poésie des grecs
- Stentor or the press of to-day and to-morrow
- The stock exchange
- Stories from the Faerie Queene
- Studies in Portuguese literature
- Sudoeste
- Supernatural religion
- The surprising experiences of Mr. Shuttlebury Cobb
- Symboles initiatiques et mystères chrétiens
- Symbolic Directions in Modern Astrology
- Symbolism in medieval thought and its consummation in the Divine Comedy
- Le système nerveux et les organes des sens