 Here's a work now composed over the period of five years. From 1875 to 1879, Alexander Borodin worked on this string quartet No. 1. Why did it take him so long? Well, actually, it took him a long time to write any of his works because he was, by profession, a chemist, a highly respected one as well, and he only wrote music in his spare time. This is the string quartet No. 1 by Borodin, played by the St. Petersburg String Quartet.