Arrived at the Estancia of the Berquelo, near Mercedes, & found the owner not at home. — he returned in the evening & I spent the day in geologising the neighbouring country.
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.