Records of the Harvard College Observatory : the Boyden Station, Arequipa, Peru, 1888-1927.
Cambridge to Arequipa correspondence, 1889 January 1-1891 February 19 Digital
Cambridge to Arequipa correspondence, 1892 March 18-1898 March 9 Digital
Cambridge to Arequipa correspondence, 1898 April 12-1908 June 4 Digital
Letters written by E.C. Pickering and Solon I. Bailey to colleagues, usually on astronomical subjects, are found on pages 600-751 (May 2, 1904-June 4, 1908).
Arequipa correspondence, 1908 June 6-1910 December 14 Digital
- A letter from E.S. King (March 15, 1913) regarding out-of-focus work at Arequipa is found on page 91 of this volume.
- Pages 500-537 consist of letters from E.C. Pickering and Solon I. Bailey to staff in South Africa (January 22, 1910-October 4, 1910).
Cambridge to Arequipa correspondence, 1902 May 13-1906 December 24 Digital
This volume contains duplicate typewritten copies of the letters found in the Cambridge to Arequipa correspondence volume, 1898 April 12-1908 June 4. It does not include copies of the enclosures found in the original volume.
Cambridge to Arequipa correspondence, 1905, April 17, 1, May 1905, 1907, January 5-1910 December 14 Digital
This folder contains duplicate typewritten copies of the letters found in the Cambridge to Arequipa correspondence volumes, 1898 April 12-1908 June 4 and 1908 June 6-1910 December 14. It does not include copies of the enclosures found in the original volumes.
Cambridge to Arequipa correspondence, notes on Arequipa correspondence, 1905 October 30-1906 October 8 Digital
This volume contains brief notes pertaining to observations made at Arequipa. The author is unidentified.
Cambridge to Arequipa correspondence, 1911 January 3-1915 January 23 Digital
Cambridge to Arequipa correspondence, 1915 January 30-1918 November 7 Digital
Cambridge to Arequipa correspondence, 1920 January 12-1922 December 12 Digital
Cambridge to Arequipa correspondence, 1923 January 4-1923 October 11 Digital
Cambridge to Arequipa correspondence, 1923 October 15-1924 December 29 Digital
Cambridge to Arequipa correspondence, 1925 January 17-1927 January 22 Digital
Arequipa to Cambridge correspondence, 1888 November 16-1889 July 16 Digital
Arequipa to Cambridge correspondence, 1889 August 4-1889 December 25 Digital
Arequipa to Cambridge correspondence, 1890 January 14-1890 July 7 Digital
Arequipa to Cambridge correspondence, 1890 August 2-1891 May 14 Digital
Arequipa to Cambridge correspondence, 1893 March 3-1894 December 1894 Digital
Arequipa to Cambridge correspondence, 1895 January 14-1896 December 22 Digital
Arequipa to Cambridge correspondence, 1897 January 5-1899 December 18 Digital
Arequipa to Cambridge correspondence, 1900 January 8-1902 December 20 Digital
Arequipa to Cambridge correspondence, 1903 January 10-1904 December 18 Digital
Arequipa to Cambridge correspondence, 1905 January 2-1906 December 31 Digital
Pages 1401-1407 contain photographs of a 13-inch telescope tailpiece.