Edward Sapir,
A note on the first person plural in Chimariko
(1917–1920)
“ The first person singular is characterized by the absence of a prefix except, in the case of stems with initial vowel, for the prefixed article-like element ṭ-, which is not properly a possessive pronominal element; the corresponding plural has ṭ-a-, the article-like ṭ- plus the properly pronominal -a-, or (before vowels) ṭ-a-ṭ-, in which ṭ- seems to be used pleonastically. The only pronominal series in Salinan not characterized by a distinctive a- in the first person plural is the objective, suffixed to the verb (-ak me; -t’ak us) ”
