1529 Eighteenth St.
Washington,
D. C.
January 1st 1923

EHE

My dear Dr. Banting,
I will need
some more insulin in a little
over a weeks time, so I
thought I would write and
tell you, so that you can
send it off to me as soon
as possible. Unfortuantely this
No. 159 is not as strong as the
156 and I have to take three