One notable addition to the general libraries' collection occurred in 1975 when The University acquired the Collection on Texas and the American West. This collection, in Billings' words, "establishes UT Austin as the finest center for Texas research in existence." With thousands of manuscripts, volumes, and maps, it is surely a tremendous resource for researchers of one of the subjects and places dearest to Billings' heart.
Literature was also a passion of Billings' that nicely complemented his efforts to contribute to the libraries' ever growing collection of research materials. He corresponded with many authors both in his personal endeavors in scholarship and in the process of bringing their materials into the collection. Years of letters from poet Jonathan Williams, now held in the Billings Papers at the Ransom Center, represent one such relationship as they worked together on projects involving a shared favorite poet, Edward Dahlberg, and Williams considered the proper home for his own papers.
With various acquisitions, Billings saw the library expand all of its collecting areas over the course of his career, from the 1 millionth volume added during his time as a cataloger onward.