Solitude, moral, [191].

Space, [265].

Spencer, [168], [218], [232-235], [246], [251], [260].

Stephen, L., [1].

Stephen, Sir J., [1], [30], [212].

Stoics, [274].

Strenuous mood, [211], [213].

Subjectivism, [165], [170].

'Subliminal self,' [315], [321].

Substance, [80].