Many a chiding did John Couch get from his father for being out late at night upon the moor; the old farmer was unable to understand what the attraction was which drew the lad from home and from his supper, to be out, either lying on the road or leaning against the old granite cross, star-gazing. Happily Mrs. Adams had a simple book on astronomy that had belonged to her father, and this her son Jack devoured, and now he began to understand something of the motions of the heavenly bodies. He established a sundial on the window-sill of the parlour, and constructed out of cardboard an apparatus for taking the altitude of the sun. [Illustration: I C ADAMS A M _From the collection of Mrs. Lewis Lane_] His father, finding that his inclinations were not for farm work, sent him to study with a relative of his mother, the Rev. P. Couch Grylls, who had a school at Devonport, but later moved to Saltash. All his spare time John Couch spent in reading astronomical works, which he obtained from the library of the Mechanics' Institute; he drew maps of constellations and computed celestial phenomena. A day long to be remembered by him as one of the happiest in his life was that in which he obtained a look through a telescope at the moon. "Why," he exclaimed, "they have Brown Willy and Rough Tor up there!" His account of a solar eclipse viewed at Devonport through a small spyglass got into print in a London paper. After three weeks' watching he caught sight of Halley's Comet on 16th October, 1839. His father now with considerable effort arranged to send him to the University of Cambridge, and he entered S. John's College as a poor sizar in October, 1839; he graduated as Senior Wrangler in 1843, and was first Smith's prizeman, and soon elected Fellow and appointed tutor of his college. At the age of twenty-two he was struck with the disturbance in the course of the planet Uranus, and he perceived that this must be due to the attraction possessed by some other planet, as yet unseen and unsuspected, that produced these perturbations. How this led to the discovery of the planet Neptune shall be told from the _Reminiscences_ of Caroline Fox:--