He is a member of Miskatonic University's engineering department, and the inventor of a drill "unique and radical in its lightness, portability, and capacity... to cope quickly with strata of varying hardness," used in the disastrous Pabodie Expedition to Antarctica in 1930–31. He also added "fuel-warming and quick-starting devices" to the expedition's four aircraft. (HPL: At the Mountains of Madness)
Behind the Mythos
It is an alternative spelling of "Peabody", a name Lovecraft was familiar with through the Peabody Museum in Salem.
He does not seem to be connected with the real life palaeontologist Frank Elmer Peabody (1914-1958).