Description: Papers of entomologist Charles Robertson (1858-1935), including correspondence, reprints, five ledgers, and a data book containing data about bee research, and specifically the interaction between bees and the plants they polinate collected in Carlinville, Illinois. Correspondents include William H. Ashmead, Daniel William Coquillett, Howard M. Parshley, and Charles Haskins Townsend, among others.