Meanwhile, Marsh's relationship with his rival Edward Drinker Cope soured further after Cope accidentally received boxes of fossils, including the toothed birds, that were meant for Marsh.
Za to vrijeme se Marshov odnos sa njegovim rivalom Edwardom Drinkerom Copeom dodatno zagorčao kada je Cope slučajno dobio nekoliko kutija fosila, zajedno sa pticama sa zubima, koje su bile namijenjene Marshu.