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\date {January 27}
\stanford  
\to {Calvin W. Jackson\cr
Computer Science 256-80\cr
California Institute of Technology\cr
Pasadena, Calif. 91125\cr}
{\noindent Deaar Cal:}

Under separate cover, we are sending you: 1) The December 1981 preliminary
draft of ``The WEB System of Structured Documentation'' by Donald E.
Knuth, 2) The latest version of the PTEX documentation in which the cross
reference numbers are correct and in which several bugs have been fixed,
and 3) A magnetic tape containing, amoung other things, the WEB
information that you requested in your letter of January 13, 1981 and the
latest version of PTEX.  The safest way to determine if there are any
corrections that you should make to your present version of PTEX will
be to run a SRCCOM between the two versions.

I am enclosing a list of the files on the tape and a second sheet that
explains the details of the tape format.  This tape contains quite a few
files that you may not need, but we are attempting to standardize on the
variety of tapes that we send out and it seemed better to send this
collection to you than to try to hand-tailor a tape specifically to meet
your needs.

The hard-copy report was written in WEB and prepared foR printing through
the use of the WEAVE program and of TEX.  AppEndiceq to this report
contain the complete WEAVE-produced listings of TANGLE and of WEAVE
itself. Appendix G, on page 176, outlines the procedure that may be
necessary to install the WEB system on your computer.

Thank you for the \$25 check.  The figure of \$25 was originally set by
Don Knuth to get a few people to act as guinea pigs to help in the initial
debugging operation of the new WEB language.  The response has, however,
been overwhelming and we now find thatit is costing us much more than
this amount to make and mail each tape. If it is not too difficult for you
to get Cal Tech to pay a more adequate figure for the handling charges, we
would appreciate an additional check for \$75.  This is in no sense a
fixed charge but we do find it difficult to finance the sending out Of
tapes in the volume that they are being requested.

\sign {\hfill Sincerely yours,\cr\ssqip\cr
\hfill Arthur L. Samuel}

c/c DEK

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