... my mind there are no advantages and many disadvantages in lecturescompared with reading. Dr. Duncan's lectures on Materia Medica at 8 o'clock on a winter's morning aresomething ... ourselves in the same cabin. We had several quarrels; for instance, early in the voyage atBahia, in Brazil, he defended and praised slavery, which I abominated, and told me that he had just visited a great ... this was an advantage, for I became well acquainted with several young men fond of naturalscience. One of these was Ainsworth, who afterwards published his travels in Assyria; he was a Werneriangeologist,...