The Correspondence and Subject File series is divided into two segments. The earliest letters (1914-1927) are organized chronologically and are all letterpress or carbon copies of outgoing mail. During this period, the Reedsburg plant was tightly administered from the Appleton main office. The letters are primarily addressed to Appleton and concern the day-to-day business of the mill such as orders, contracts, payroll, and payment of bills. The major correspondents from Reedsburg are mill managers George Seagraves and William Ehlert.

The balance of the series is arranged by letter of the alphabet according to the corporate or individual correspondent's name, and chronologically thereunder. Only scattered items date from the 1930's and early 1940's. The volume picks up in the mid-1940's with the great bulk of materials falling between 1946 and 1964. Files for the years preceding Appleton's 1954 sale of the mill show the increased autonomy of the plant. Especially important is correspondence with the Appleton mill and with Appleton executives including T. E. Orbison and A. H. Thurner. Both before and after the mill came under local Reedsburg control the series contains large amounts of incoming and outgoing correspondence with concerns with which Reedsburg did business. It contains a wide variety of information on all phases of mill operation including marketing, shipping, fabric design, and supplies and equipment purchases. Particularly significant for marketing and sales information is the correspondence with the W.A. Landry Company of New York. The Landry Company (Reedsburg-Landry Associates after 1961) was the mill's main sales agent. Supplementing the correspondence are several important subject files which include information such as tax records, a time study of spinners, and formal and informal suggestions for fabric design.

The transfer agreement and other information on the 1954 sale of the mill is found in the Appleton files. By-laws and a list of the new firm's stockholders (in boxes 9 and 41 respectively) are also significant documentation of the change-over. Post-1954 files contain an even greater concentration of information on Reedsburg sales and marketing. In addition to the Landry letters, there is correspondence with sales agents Frank Starr and Walter Ford, and with Sears and Roebuck and numerous other companies which bought Reedsburg goods.