The earliest card repertory is that of Dr. William Jefferson Guernsey- "Guernsey's Boenninghausen's slips". Here Dr. Guernsey used the medicines which were in Boenninghausen's Therapeutic Pocket Book.
Later Dr. H. C. Allen improved these original slips by adding more remedies and they were known as- "Allen's Boenninghausen's Slips".
The following is the advertisement of "Allen's Boenninghausen's Slips" made by Dr. H. C. Allen himself, appeared in The Medical Advance in its volume XXXVI in 1908. It is self explanatory. See it yourself!