I arrive in Australia.--Join my two Sons at their Sheep-station. --Return to Melbourne and Remove to Ballaarat.--Visit to Mr. Skene. --My son studies Surveying.--His Rapid Proficiency.--Appointed to take Charge of a Party.--Letters on various Subjects to his Mother and Brother at Home. CHAPTER 4. My Son is appointed to the Magnetic Observatory at Melbourne, under Professor Neumayer.--His Rapid Advance in the Study of Magnetism and Mineralogy.--Letters to his Relatives at Home, descriptive of his Pursuits, Wishes, and Sentiments.--First suggestions of his Probable Employment on the Exploring Expedition. CHAPTER 5. Postponement of the Exploring Expedition projected at the beginning of 1860.--My Son's Letter to his Sister on going into Society.--Mr. Birnie's Opinion of him, and Extract from his Lecture.--Letter from William to his Mother on Religious Views and Definitions of Faith. --His last Communications to his family at Home, before the Departure of the Expedition. CHAPTER 6. THE EXPEDITION. How the Expedition originated.--Appointment of the Leader, Officers, and Party.--Mr. Robert O'Hara Burke, Mr. G.J. Landells, Mr. W.J. Wills, Dr. Herman Beckler, Dr. Ludwig Becker, etc.--The Expedition starts from Melbourne on the 20th of August, 1860. --Progress to Swan Hill.--Discharge of Mr. Ferguson, the Foreman. --Advance to Menindie.--Resignation of Mr. Landells and Dr. Herman Beckler.--Mr. Wills promoted to second in command, and Mr. Wright to third. CHAPTER 7. From Menindie on the Darling to Torowoto.--Mr. Burke's Despatch, and Mr. Wills's Report from Torowoto.--Mr. Wright's unaccountable delay at Menindie.--The Expedition proceeds onwards to Cooper's Creek.--Exploring Trips in that neighbourhood.--Loss of three Camels.--Mr. Wills's Letter to his Sister, December 6th and 15th. --Incorrectness of McDonough's Statements. CHAPTER 8. Mr. Wills's Survey of the line of Country pursued by the Expedition, from Torowoto Swamp to Cooper's Creek. CHAPTER 9. Departure from Cooper's Creek for the Gulf of Carpentaria. --Arrangements for the continuance of the Depot at Cooper's Creek. --Mr. Brahe left in Charge.--Determination of Route.--Progress and Incidents.--Mr. Wills's Field Books, from the 16th of December, 1860, to the 30th of January, 1861, 1 to 9.--Shores of Carpentaria. CHAPTER 10. Return from Carpentaria to Cooper's Creek.--Mr. Wills's Journals from February 19th to April 21st, 1861.--Illness and Death of Gray. --The Survivors arrive at Cooper's Creek Depot and find it deserted.--A Small Stock of Provisions left.--Conduct of Brahe. --Report of the Royal Commission. CHAPTER 11. Proceedings in Melbourne.--Meeting of the Exploration Committee. --Tardy Resolutions.--Departure of Mr. Howitt.--Patriotic Effort of Mr. Orkney.--South Australian Expedition under Mr. McKinlay.--News of White Men and Camels having been seen by Natives in the Interior.--Certain Intelligence of the Fate of the Explorers reaches Melbourne. CHAPTER 12.