Rubuta ci gaba don wannan sakin layi - Montagu ya yi aiki a cikin Jirgin Ruwa na Bahar Rum a matsayin mai kula da jirgin ruwa a cikin jirgin ruwa a karkashin umurnin A. C. Hobart. Henry Keppel ya zaba shi da kansa don yin aiki a cikin jirgin ruwa, tare da jirgin da ya tashi daga Portsmouth zuwa China Station a watan Oktoba na 1856; "Raleigh" na kwanaki 28 zuwa Cape of Good Hope an dauke shi a matsayin rikodin jirgin ruwa. Bayan da ya tsaya a Penang da Singapore, "Raleigh" ya ci gaba da gaggawa zuwa Hong Kong tare da yaki
da ke gabatowa da China. Bayan watanni da yawa a teku, "Raleigh" ya zo cikin talatin mil na Hong Kong, lokacin da a ranar 14 ga Afrilu 1857 jirgin ya buga duwatsu marasa tushe. Duk da kokarin da ma'aikatan jirgin suka yi na fitar da ruwan daga jirgin na tsawon lokacin da zai isa Hong Kong, "Raleigh" ya ƙare a bakin rairayin bakin teku, tare da ma'aikatan jirgin da ke ƙaura zuwa tsibirin da ke kusa. Tare da taimakon sojojin ruwan Faransa, ma'aikatan jirgin sun koma Hong Kong, tare da Montagu ya koma jirgin.