From the third letter:
We realize that since you were taken ill your expenses must have been burdensome, and if you feel that at the moment the cost of a complete treatment of Tuberculozyne is more than you can readily meet, we will send you the full month’s supply upon receipt of but 40s.; the remaining 10s. you may pay at your own convenience when you are fully satisfied that your cure is complete and permanent.
From the fifth:
It is therefore with a genuine desire to help you that we write enclosing a Special Voucher Coupon issued in your name, which will help you materially if the cost of our remarkable specific has been more than you could really meet.... This Special Voucher Coupon which we have issued to you is good for £1 Sterling when sent with your order for Tuberculozyne. You have only to post the coupon together with 30s., and immediately we will forward to you the complete treatment and full instructions for its use.
From later letters:
Even if her improvement is not at once pronounced, do not be discouraged; for in some cases the patients at first even seemed to be losing ground, but they persevered and finally were cured. It would be much better to take the treatment a few weeks too long than to stop too soon....
Just at this time, when the patient has been taking our treatment for some weeks and it is beginning to permeate her system through and through, courage is needed, for great improvement may not yet be apparent though her cure be assured.
Every letter was accompanied with one lithographed copy, or more, of testimonials.
The directions were:
After each meal, put thirty drops of the medicine from each bottle into a tumbler of milk; stir well and drink immediately.