Ku dhammee weedhan soo socota: Murphy wuxuu ku dhashay Degmada Westchester, New York, waxaana loo magacaabay midshipman bishii Ogosto 10, 1841. Wuxuu ka soo shaqeeyey dagaalkii Mexico
Vera Cruz iyo Tabasco waxay saaran yihiin markabka Waxa uu iska casilay xilkii uu ka ahaa mid midkii la soo dhaafay May 10, 1852, ka dib markii uu ahaa kaaliyihii ugu dambeeyay ee John G. Barnard ee sahaminta Isthmus of Tehuantepec. Wuxuu galay qaybta gaarka loo leeyahay, isagoo ka shaqeynayay sarkaalkii ugu horreeyay ee safka Collins ee maraakiibta uumiga ah, kormeeraha magaalada ee magaalada New York, Injineerka ugu sarreeya ee Brooklyn Navy Yard, ugu dambeyntiina wuxuu xubin ka ahaa Senate-ka Gobolka New York (4th D.) 1860 iyo 1861.