I tied up the enclosed key with my books last night, and make haste to return it lest its absence should occasion confusion. If it has, it will perhaps remind you of the disorder I must be in here also for the want of a key--I mean the one to my heart. However, I know where my key is, and hope soon to have it here, and then the Institution will be all right again. Let no one oppose my gaining possession of it when unavoidable obstacles are removed. Ever, my dear girl, one who is perfectly yours, M. FARADAY. Faraday obtained leave of the managers to bring his wife to live in his rooms at the Institution; and in May, 1821, his position was changed from that of lecture assistant to that of superintendent of the house and laboratory. In these changes Sir Humphry Davy gave him willing assistance. But his salary remained £100 a year. Obstacles being now removed, Faraday and Miss Barnard were married on June 12. Few persons were asked to the wedding, for Faraday wished it to be “just like any other day.” “There will,” he wrote, “be no bustle, no noise, no hurry ... it is in the heart that we expect and look for pleasure.” [Sidenote: A HAPPY MARRIAGE.] His marriage, though childless, was extremely happy. Mrs. Faraday proved to be exactly the true helpmeet for his need; and he loved her to the end of his life with a chivalrous devotion which has become almost a proverb. Little indications of his attachment crop up in unexpected places in his subsequent career; but as with his religious views so with his domestic affairs, he never obtruded them upon others, nor yet shrank from mentioning them when there was cause. Tyndall, in after years, made the intensity of Faraday’s attachment to his wife the subject of a striking simile: “Never, I believe, existed a manlier, purer, steadier love. Like a burning diamond, it continued to shed, for six and forty years, its white and smokeless glow.” In his diploma-book, now in possession of the Royal Society, in which he carefully preserved all the certificates, awards, and honours bestowed upon him by academies and universities, there may be found on a slip inserted in the volume this entry:-- 25th January, 1847. Amongst these records and events, I here insert the date of one which, as a source of honour and happiness, far exceeds the rest. We were _married_ on June 12, 1821. M. FARADAY. And two years later, in the autobiographical notes he wrote:-- On June 12, 1821, he married--an event which more than any other contributed to his earthly happiness and healthful state of mind. The union has continued for twenty-eight years, and has nowise changed, except in the depth and strength of its character.