This graph vividly shows the difference in the survival of records between the academics and field workers. The papers received by Whewell and Lubbock are well preserved. The papers that they issued, are in general only preserved when they were addressed to some equal notable or to an institution. The papers received by the Hydrographic Office and the Royal Greenwich Observatory hold letters sent to Beaufort and Airy. Letters from Airy exceed those to him because he famously kept flimsies. Bunt was a private individual and the many papers he received have never been located. Dessiou and Ross both worked in the Hydrographic Office and it is mystery why the papers received by them there are not locatable. Stratford was the first Superintendent of the Nautical Almanac Office, the nineteenth century records of that office were twice decimated by fire in the century which followed.