[...] the pitch differences [...] may not affect the word as such, but [...] may be a more or less random or, at best, but a rethorical phenomenon, while in other languages [...] may be more finely graduated and felt as integral characteristics of the words themselves.
- Sapir (1921), a pag.54

Pitch accent may be as functional as stress and its perhaps more often so.
- Sapir (1921), a pag.79

The mere fact [...] that pitch variations are phonetically essential to the language, as in Chinese [...] does not necessarily constitute a functional, or perhaps we had better say grammatical, use of pitch.
- Sapir (1921), a pag.79

In aboriginal America [...] pitch accent is known to occur as a grammatical process. A good example of such a pitch language is Tlingit [...] In this language many verbs vary the tone of the radical element according to tense [...]
- Sapir (1921), a pag.80

[...] pitch accent, like stress and vocalic or consonantal modifications, is far less infrequently employed as a grammatical process than our own habits of speech would prepare us to believe probable.
- Sapir (1921), a pag.81