I'm not absolutely sure who Parker was, or even if there was a Parker involved with this preparation. Other authors I've read all believe that this was one of David Hiscox's own preparations. He certainly was the Proprietor during the years the preparation was popular. I did find a reference to a Charles R. Parker in New York in 1867, who was in the Patent Medicine business. Unfortunately, he didn't list his products. Parker's Hair Balsam was listed for sale in the 1885 McKesson & Robbins catalog, and later in the 1901 Morrison & Plummer catalog.