I have already mentioned in these papers my meeting with Joachim in Leipsic in the year 1849. He was then about eighteen years of age and already famous as a violinist. He was of medium height, had broad, open features, and a heavy shock of dark hair somewhat like that of Rubinstein. I had a letter of introduction to him, which I presented a short time after my arrival in Leipsic, and received immediately a return call from him. He was kind and affable, and easy to become acquainted with, but owing to diffidence on my part I did not improve the opportunity as I should have done, a circumstance which I now much regret. He played the Mendelssohn concerto in one of the Gewandhaus concerts within a month of my arrival at Leipsic, and I heard him then for the first time, and was much impressed by his beautiful performance. Subsequently, when in Weimar, I had the pleasure of meeting him on many occasions, for he was in the habit of going there not infrequently, and would sometimes take part in the Altenburg private musicales, as well as in the public concerts at the theater. During the year 1845-46 I heard and became well acquainted with three famous violinists, Vieuxtemps, Ole Bull, and Sivori, who came to Boston and played many times both in public and in private. They were all great players, each having his special individuality. Vieuxtemps and Ole Bull I met several times in later years, and became familiar with their playing. Vieuxtemps came to Weimar and played both in private and in public. His playing was wonderfully precise and accurate, every tone receiving due attention, and his phrasing was delightful. Scale and arpeggio passages were absolutely clean and without a flaw. He was certainly a player of exquisite taste, and he still preserved his characteristics when I heard him years later, in 1853 at Weimar, and in 1873 at New York. Ole Bull came to Boston a year or so after Vieuxtemps. He was a born violinist, and developed after his own fashion and nature, in the manner of a genius. Vieuxtemps was the result of scientific training and close adherence to well-founded principles. Ole Bull, on the other hand, was a law unto himself, and burst out into full blossom without showing the various degrees of growth. He did not realize the importance of close attention to detail while in the course of development.