Indeed, his perseverance in a noble strife was another of the grand elements in his success. His tenacity of purpose showed itself equally in little and in great things. Arranging some apparatus one day with a philosophical instrument maker, he let fall on the floor a small piece of glass: he made several ineffectual attempts to pick it up. "Never mind," said his companion, "it is not worth the trouble." "Well, but, Murray, I don't like to be beaten by something that I have once tried to do." The same principle is apparent in that long series of electrical researches, where for a quarter of a century he marched steadily along that path of discovery into which he had been lured by the genius of Davy. And so, whatever course was set before him, he ran with patience towards the goal, not diverted by the thousand objects of interest which he passed by, nor stopping to pick up the golden apples that were flung before his feet. This tremendous faculty of work was relieved by a wonderful playfulness. This rarely appears in his writings, but was very frequent in his social intercourse. It was a simple-hearted joyousness, the effervescence of a spirit at peace with God and man. It not seldom, however, assumed the form of good-natured banter or a practical joke. Indications of this playfulness have already been given, and I have tried to put upon paper some instances that occur to my own recollection, but the fun depended so much upon his manner, that it loses its aroma when separated from himself. However, I will try one story. I was spending a night at an hotel at Ramsgate when on lighthouse business. Early in the morning there came a knock at the bed-room door, but, as I happened to be performing my ablutions, I cried, "Who's there?" "Guess." I went over the names of my brother commissioners, but heard only "No, no," till, not thinking of any other friend likely to hunt me up in that place, I left off guessing; and on opening the door I saw Faraday enjoying with a laugh my inability to recognize his voice through a deal board. A student of the late Professor Daniell tells me that he remembers Faraday often coming into the lecture-room at King's College just when the Professor had finished and was explaining matters more fully to any of his pupils who chose to come down to the table. One day the subject discoursed on and illustrated had been sulphuretted hydrogen, and a little of the gas had escaped into the room, as it perversely will do. When Faraday entered he put on a look of astonishment, as though he had never smelt such a thing before, and in a comical manner said, "Ah! a savoury lecture, Daniell!" On another occasion there was a little ammonia left in a jar over mercury. He pressed Daniell to tell him what it was, and when the Professor had put his head down to see more clearly, he whiffed some of the pungent gas into his face.