The Beagle Diary was later used to write Darwin's famous book 'Voyage of the Beagle' (1839). The narrative of the surveying voyages of His Majesty's Ships Adventure and Beagle between the years 1826 and 1836. Darwin describes each day of the voyage, some in intimate detail, during the Beagle's circumnavigation of the globe.
25th February 1835
Mocha This island of Mocha has been an island of trouble to us. This day we sailed round it making a plan; in the evening the swell prevented us anchoring. — A gale from the North followed, & the wind, instead of changing to the South, continued in this unlucky point.