Frome continues the section on the necessities of exploration with the method of navigating on land. He realises that there will be difficulties in the field that meaning that the land explorer may be unable to take a regular noon sight (the traditional time to establish latitude at sea) and may find it more convenient to determine his latitude by the stars; Frome describes how. He also describes how to check the chronometer for accurate determination of longitude. All of these calculations will enable the explorer to produce a map of his route.

Captain Edward Charles Frome, Royal Engineers, arrived in South Australia in September 1839 to take up the task of surveying South Australia. The country blocks were his immediate priority. This was a task that the first Surveyor-General, William Light had been unable to complete because of interference from London. Frome had an onerous task as the colonists clamoured for their land. He had not only to revise the work that had been inadequately marked by George Kingston, Light's second-in-command, but also to commence the Special Surveys of very large country sections. By 1841 Frome had laid out roads and secondary towns and taken accurate trigonometrical survey to the limits of settlement. Frome returned to England in 1849 and retired in 1877 with the rank of General.

Frome, Edward Charles, 1802-1890

State Library of South Australia: Mortlock Wing. Taking it to the edge August 2004-