From Introduction: "Figure 1 shows the location of sources that have been either exploited or seriously considered at one time or another, super-imposed upon a map indicating by small letters the order of consumption of K2O in the leading States; the amount used in these States, together with the percentage of the total consumption of potash used as fertilizer in the United States in 1939, is given in table 1. Figure 2 shows the domestic production and total consumption of potassium salts, in terms of tons of K2O, with the value per unit at the plants, for each year since 1913. Considered together, these two figures tell a significant story."

Letter from Cornelia Yerkes discussing flying from Wichita to Atlanta, visiting with people there, flying to Richmond, and future plans. Written on Hotel John Marshall (Richmond) stationary.

Letter from Cornelia Yerkes discussing ferrying a P-40 from Buffalo to Columbia, SC, delays, returning to Dallas, and recent correspondence. Written on Eastern Air Lines stationary.

Letter from WASP Cornelia Yerkes discussing flowers, riding a train to Dallas, orders, recent correspondence, the end of the WASP program, and preparing to fly to Kansas City. Written on the Sheraton Hotel stationary.

Letter from WASP Cornelia Yerkes to her parents discussing picking up a new plane, being grounded by weather, the possibility of visiting, her father's health, a problem with her wrist, flying to Dallas, a colonel, and buying her friend a wedding gift. Typed (on May 12) and written (on May 14) on Hotel John Marshall (Richmond) stationary.

Letter from I. H. Kempner to Howard Brooks thanking Brook's for the editorial, "Our Knight in Shining Armor" and discussing his two-week absence.

Letter from John Lloyd Newcomb to Daniel W. Kempner asking Kempner to contribute to the Alumni Fund.

Letter to Daniel W. Kempner discussing a safe arrival to a hotel.