Val Logsdon Fitch, (1923-2015)was born on March 10, 1923, in Merriman, Nebraska, in the remote Sandhills region in the north of the state. During WWII, he was drafted and sent to Los Alamos, N.M., to work as a technician on the Manhattan Project. While there, he helped design the detonator for the atomic bomb that was tested at Alamogordo and later dropped on Nagasaki, Japan. He shared the 1980 Nobel Prize in Physics with James Cronin for work that revealed a surprising imbalance in the laws of nature and helped explain why the collision of matter and antimatter has not destroyed everything in the universe. Their discovery of CP (charge parity invariance) violation was the result of experiments that included four objectives: to test the anomalous results of Adair, et al, to study the regeneration phenomena under a variety of conditions in different materials, to set new limits on the decay of the long-lived neutral K to two pions, and to check for the presence of neutral currents in strangeness changing decays. The Val Logsdon Fitch Papers include his research of K mesons, the innovation of the velocity-selecting Cherenkov counter that separated K+ from protons and pions in the beam, neutral kaons, CP violation in proton-antiproton interactions, the 'gap' method invented by Fitch to take measurements of KL - KS mass difference, a search for short-distance gravitational forces and finally, strange dibaryons. Dr. Fitch used particle accelerators to perform his experiments including the Bevatron, the Cosmotron, the accelerator at the Fermilab and the superconducting super collider at CERN, Geneva, Switzerland. The collection is divided into XV Series.