File 26 September 1861-22 July 1862 Box 1, Folder 17 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence
File 26 October 1863-2 September 1864 Box 1, Folder 18 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence
File 18 November 1864-30 October 1865 Box 1, Folder 19 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence
File 3 November 1865-12 February 1866 Box 1, Folder 20 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence
File 15 February 1866-25 October 1866 Box 1, Folder 21 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence
File Undated October 1866-7 March 1867 Box 1, Folder 22 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence
File 26 August 1867-3 June 1868 Box 1, Folder 23 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence
File 27 January 1868-30 January 1900 Box 1, Folder 24 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence
File 30 January 1901 Box 1, Folder 25 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence
File 6 May 1906-6 July 1906 Box 1, Folder 26 In: Langstroth family papers, 1778-1955 (majority within 1831-1911) » Correspondence