Maybe that Ridley Pearson mystery I'm working on and a tooth brush.
Beyond the introduction of the spider line it is unnecessary to mention the various steps by which the Gascoigne micrometer assumed the modern forms now in use, or to describe in detail the suggestions of Hooke, 4 Wren, Smeaton, Cassini, Bradley, Maskelyne, Herschel, Arago, Pearson, Bessel, Struve, Dawes, &c., or the successive productions of the great artists Ramsden, Troughton, Fraunhofer, Ertel, Simms, Cooke, Grubb, Clarke and Repsold.
Here it is right to speak of Karl Pearson as a pioneer of notable importance.
7; Pearson, Grammar of Science; Romanes, Darwin and after Darwin; Sedgwick, Presidential Address to Section Zoology, Brit.
Further references of great value will be found in the works of Bateson and Pearson referred to above, and in the annual volumes of the Zoological Record, particularly under the head " General Subject."