Foucault-L mail-list

Dear list members,

I need some help with Foucault's notion of "discourse". Does anyone 
know:

a) Why did Foucault choose the term "discours"?

b) Is there any impact from Wittgenstein on Foucault (Wittgenstein's 
notion of "Sprachspiel" for me seems to come quiet near to what is 
meant by "discours")?

c) We are very familiar with "discourse" as a term in ordinary 
language (= speech, conversation, dialogue). Within the philosophical 
'discourse' the word appears in Bentham or Morris with the 
characteristics of a distinct notion. Could there be a connection to 
Foucault?

d) Has anybody in mind a precise definition of "discourse" in 
Foucault or must one distinguish between the "early" an the "late" 
Foucault?

Thanks in advance

Helge