Carl Diamond Greenleaf was an Ohio millner, who bought the Conn company, the instrument manufacturer, along with much of the property backing the bonds. Carl Greenleaf, along with his chosen successors Paul Gazlay and Carl’s son Leland Greenleaf, accomplished tremendous transformation and growth. The company was reincorporated as CG Conn Ltd,. Greenleaf was obviously a man to see if you had an idea or wanted to get something done. One of the more fortuitous events of this kind occured one day when two music educators appeared at Mr. Greenleaf's office with an easy method music book for beginning bands. Mr. Greenleaf knew the band movement was plagued by a lack of just such music, geared to young groups, yet interesting enough to motivate the players. In looking over the material presented by the two men, Joseph E. Maddy and T.P. Giddings, he particularly noted that in every tune there was at least one part where each instrument carried the air for a few bars. This was intended to maintain the interest of the children. Mr. Greenleaf was quite impressed and arranged for Conn to publish the method. It was called the "Universal Teacher" and became a landmark in education. A few years later, as a result of the success of the band contests, Mr. Maddy and Mr. Giddings decided there should be a permanent place where the contests and other large-scale musical events could be held every year. Mr. Maddy approached Mr. Greenleaf with plans for such an installation at Interlochen, Michigan. Mr. Greenleaf obtained loans from Conn and other companies totaling $15,000 for construction of what became known as the Interlochen Bowl. With a loan from band instrument manufacturers plus a personal gift from Greenleaf and additional funds from Traverse City bankers, construction of the camp began. Out of this came the famous National Music Camp at Interlochen - the first of many such camps that today offer scholarships and facilities for musicians and composers as well as music festivals and other programs. Mr Greenleaf's association with the camp at Interlochen as benefactor and friend was lifelong, and the camp is now the home of the important Greenleaf collection, composed of antique and unusual instruments from around the world.