Letters to Karl Pearson <p>Letters to Karl Pearson from :</p> <li>George McMullan concerning Pearson's paper about the family with ectrodactyly printed in <i>Biometrika</i> vol 6 (See PEARSON/7/36). Provides more information about the Sadler family.</li> <li>Letters from Robert Jones, London County Lunatic Asylum, Claybury, to George McMullan about patient, Elizabeth Smith.</li> <li>letters from Denis Browne about history of the Sadler family.</li> <li>sketch of Elizabeth Richens' foot by Karl Pearson.</li> 1912-1913