However, my character will not be able to receive medical treatment (the setting will be early agricultural-level society), and, as I want him to live, I would like to know:
a) how *little* damage would be necessary to cause aphasia, and
b) what the progress of and healing of an *untreated* head injury would be (an approximate timetable would be lovely, if possible, from injury to return to daily life).
I thank you very much! (my character, on the other hand, is calling his travel agent while he still can)