finding source code

Hello I am new to this mailing list.

I would like to understand how the clifford implementation works so I have 
been trying to find the source code definition. I understand that this is 
mixed into a pamphlet file? I downloaded the src but the only such file that I 
could find is:

clifford.input.pamphlet

However this file only seems to to contain the documentation in a coded form?

I also tried:

(1) -> )lisp (tangle "/axiom/axiom/src/input/clifford.input.pamphlet")

Value = NIL
(1) ->

Could anyone help me find the source of the clifford definition?

Thanks,

Martin