| Description | <p>Letters written to Karl Pearson in relation to his research into the history of statistics:</p>
<li>Assistant Secretary to the Royal Society, 20 December 1922. Letter informing Pearson that a photograph was taken of the portrait of Sir Christopher Wren, and that copies may be available.</li>
<li>Fitzmaurice, Edmond George Petty, Baron Fitzmaurice, 10 November 1921. Regarding Pearson's enquiries about the papers of William Petty. Fitzmaurice advises Pearson to contact his nephew.</li>
<li>Petty-Fitzmaurice, Henry William Edmund, 6th Marquess of Lansdowne and 7th Earl of Kerry, seven letters December 1921 to February 1922. Letters to Pearson regarding the papers of William Petty, and Pearson's research into Petty's work on the Bills of Mortality and the Census.</li>
<li>Also included is the transcript of a letter from John Wallis (English mathematician, 1616-1703), apparently to Isaac Newton, regarding Gottfried Leibniz.</li> |