The main object of this Zambesi Expedition, as our instructions from Her Majesty's Government explicitly stated, was to extend the knowledge already attained of the geography and mineral and agricultural resources of Eastern and Central Africa--to improve our acquaintance with the inhabitants, and to endeavour to engage them to apply themselves to industrial pursuits and to the cultivation of their lands, with a view to the production of raw material to be exported to England in return for British manufactures; and it was hoped that, by encouraging the natives to occupy themselves in the development of the resources of the country, a considerable advance might be made towards the extinction of the slave- trade, as they would not be long in discovering that the former would eventually be a more certain source of profit than the latter. The Expedition was sent in accordance with the settled policy of the English Government; and the Earl of Clarendon, being then at the head of the Foreign Office, the Mission was organized under his immediate care. When a change of Government ensued, we experienced the same generous countenance and sympathy from the Earl of Malmesbury, as we had previously received from Lord Clarendon; and, on the accession of Earl Russell to the high office he has so long filled, we were always favoured with equally ready attention and the same prompt assistance. Thus the conviction was produced that our work embodied the principles, not of any one party, but of the hearts of the statesmen and of the people of England generally. The Expedition owes great obligations to the Lords of the Admiralty for their unvarying readiness to render us every assistance in their power; and to the warm-hearted and ever-obliging hydrographer to the Admiralty, the late Admiral Washington, as a subordinate, but most effective agent, our heartfelt gratitude is also due; and we must ever thankfully acknowledge that our efficiency was mainly due to the kind services of Admirals Sir Frederick Grey, Sir Baldwin Walker, and all the naval officers serving under them on the East Coast. Nor must I omit to record our obligations to Mr. Skead, R.N. The Luawe was carefully sounded and surveyed by this officer, whose skilful and zealous labours, both on that river, and afterwards on the Lower Zambesi, were deserving of all praise.