In February, 1829, he left for London, on the way visiting his father at Heimersleben, where he had returned after retirement from office; and he reached the English metropolis March 19th. His liberty was much curtailed as a student in this new seminary, but, as no rule conflicted with his conscience, he submitted. He studied about twelve hours daily, giving attention mainly to Hebrew and cognate branches closely connected with his expected field. Sensible of the risk of that deadness of soul which often results from undue absorption in mental studies, he committed to memory much of the Hebrew Old Testament and pursued his tasks in a prayerful spirit, seeking God's help in matters, however minute, connected with daily duty. Tempted to the continual use of his native tongue by living with his German countrymen, he made little progress in English, which he afterward regretted; and he was wont, therefore, to counsel those who propose to work among a foreign people, not only to live among them in order to learn their language, but to keep aloof as far as may be from their own countrymen, so as to be compelled to use the tongue which is to give them access to those among whom they labour. In connection with this removal to Britain a seemingly trivial occurrence left upon him a lasting impress--another proof that there are no little things in life. Upon a very small hinge a huge door may swing and turn. It is, in fact, often the apparently trifling events that mould our history, work, and destiny. A student incidentally mentioned a dentist in Exeter--a Mr. Groves--who for the Lord's sake had resigned his calling with fifteen hundred pounds a year, and with wife and children offered himself as a missionary to Persia, _simply trusting the Lord for all temporal supplies._ This act of self-denying trust had a strange charm for Mr. Muller, and he could not dismiss it from his mind; indeed, he distinctly entered it in his journal and wrote about it to friends at home. It was _another lesson in faith,_ and in the very line of that trust of which for more than sixty years he was to be so conspicuous an example and illustration.