In 1849, Carnegie became a telegraph messenger boy in the Pittsburgh Office of the Ohio Telegraph Company, at $2.50 per week ($ by inflation) following the recommendation of his uncle. He was a hard worker and would memorize all of the locations of Pittsburgh's businesses and the faces of important men. He made many connections this way. He also paid close attention to his work and quickly learned to distinguish the differing sounds the incoming telegraph signals produced. He developed the ability to translate signals by ear, without using the paper slip, and within a year was promoted to operator. Carnegie's education and passion for reading was given a boost by Colonel James Anderson, who opened his personal library of 400 volumes to working boys each Saturday night. Carnegie was a consistent borrower and a "self-made man" in both his economic development and his intellectual and cultural development. He was so grateful to Colonel Anderson for the use of his library that he "resolved, if ever wealth came to me, see to it that other poor boys might receive opportunities similar to those for which we were indebted to the noble man". His capacity, his willingness for hard work, his perseverance and his alertness soon brought him opportunities.