Primary support: complete Congressional Record segment for January 23, 1930, printed p. 2235, reproducing Doran’s January 22 letter.
In a January 22, 1930 Treasury Department letter, Prohibition Commissioner James M. Doran named eleven concentration warehousemen that were distillers or successors to distillers and had received medicinal-whiskey manufacturing allotments; he stated that the allotments were based on approximately 2,000,000 gallons or 40,000 barrels and that permits did not confine companies to rye or bourbon.
The complete 84-page segment was reviewed; the letter was checked against the high-resolution scan of printed page 2235.
This is a dated administrative snapshot. The named entities include concentration warehousemen, distillers, and successors; it does not establish a permanent exclusive roster for all of Prohibition or prove that the full allotment was actually produced.
The official record reproduces Doran’s list, his explanation of the permits, and the aggregate allotment basis.
Corrects the common oversimplification that exactly six Kentucky distilleries alone supplied medicinal whiskey throughout Prohibition.