<span>Handwritten card from Mary R. Calvert to Charles F. Brush, Sr., acknowledging receipt of Brush's paper, originally intended to be delivered to her uncle, the late Professor E. E. Barnard, Calvert </span><span>plans to place it with other papers of Barnard's, which will go to the Yorkes Observatory library.Charles F. Brush, Sr., PapersSeries 1: CorrespondenceSubseries 2: Acknowledgments (1921-1929)Box 3Folder 1</span>