Mr. Stanley found it much more difficult to get into Africa than to that singular land. It was understood, according to the best intelligence to be had that Dr. Livingstone would probably be found, if found at all, not far from Ujiji. From Bagamoyo, on the mainland of Africa, opposite the island of Zanzibar, there is a caravan route to Unyanyembe. The journey generally takes some four months. At the time Mr. Stanley undertook to proceed inland, he found the country disturbed by wars, and though starting now and again, he was delayed many weary months on this account. “Forward and back” was the necessary call of the situation. At length the country became so far quiet between Bagamoyo and Unyanyembe that the expedition, which terminated in success, set forth very early in April, 1871, and, after an unusually rapid journey, the caravan reached Unyanyembe on the 23d of June. Hence letters were dispatched home, but from this time for more than a year, the world remained in ignorance of the fate of the expedition. Upon the morning of the 2d of July, 1872, however, in the midst of the great Peace Jubilee at the city of Boston, appeared a cable telegram from London to the New York “Herald,” announcing the discovery of Livingstone and the consequent complete success of the great American journal’s enterprise. This telegram is worthy of preservation, though superseded by the fuller information in Mr. Stanley’s letters, as an illustration of newspaper enterprise: LONDON, JULY 1, 1872. THE GLORIOUS NEWS. It is with the deepest emotions of pride and pleasure that I announce the arrival this day of letters from Mr. Stanley, Chief of the HERALD Exploring Expedition to Central Africa. I have forwarded the letters by mail. Knowing, however, the importance of the subject and the impatience with which RELIABLE NEWS is awaited, I hasten to telegraph a summary of the HERALD explorer’s letters, which are full of the most romantic interest, while affirming, emphatically, THE SAFETY OF DR. LIVINGSTONE, and confirming the meagre reports already sent on here by telegraph from Bombay and duly forwarded to the HERALD. To bring up the thread of THE THRILLING NARRATIVE where the last communication from him ended he proceeds with his account of the journey. It will be recalled that when last heard from he had arrived in the country of Unyanyembe, after a perilous march of eighty-two days from Bagamoyo, on the coast opposite the island of Zanzibar. The road up to this point had been in THE REGULAR CARAVAN TRACK, and the journey was performed in a much shorter time than the same distance had been traversed by previous explorers. The expedition ARRIVED AT UNYANYEMBE