“If you can find out any people in Edinburgh who do not see colours (I know the Dicksons don’t), pray drop a hint that I would like to see them. I have put one here up to a dodge by which he distinguishes colours without fail. I have also constructed a pair of squinting spectacles, and am beginning operations on a squinting man.” A paper written for his own use originally some time in 1854, but communicated as a parting gift to his friend Farrar, who was about to become a master at Marlborough, gives us some insight into his view of life at the age of twenty-three. “He that would enjoy life and act with freedom must have the work of the day continually before his eyes. Not yesterday’s work, lest he fall into despair; nor to-morrow’s, lest he become a visionary--not that which ends with the day, which is a worldly work; nor yet that only which remains to eternity, for by it he cannot shape his actions. “Happy is the man who can recognise in the work of to-day a connected portion of the work of life and an embodiment of the work of Eternity. The foundations of his confidence are unchangeable, for he has been made a partaker of Infinity. He strenuously works out his daily enterprises because the present is given him for a possession. “Thus ought Man to be an impersonation of the divine process of nature, and to show forth the union of the infinite with the finite, not slighting his temporal existence, remembering that in it only is individual action possible; nor yet shutting out from his view that which is eternal, knowing that Time is a mystery which man cannot endure to contemplate until eternal Truth enlighten it.” His father was unwell in the Christmas vacation of that year, and he could not return to Cambridge at the beginning of the Lent term. “My steps,” he writes[20] to C. J. Munro from Edinburgh, February 19th, 1855, “will be no more by the reedy and crooked till Easter term.... I should like to know how many kept bacalaurean weeks go to each of these terms, and when they begin and end. Overhaul the Calendar, and when found make note of.” He was back in Cambridge for the May term, working at the motion of fluids and at his colour-top. A paper on “Experiments on Colour as Perceived by the Eye” was communicated to the Royal Society of Edinburgh on March 19th, 1855. The experiments were shown to the Cambridge Philosophical Society in May following, and the results are thus described in two letters[21] to his father, Saturday, May 5th, 1855: