21st October 1768

Cape de Verde Islands to Brazil
A moderate breeze, and for the most part clear weather. Longitude per the Mean of 2 Observations of the sun and moon made at 4 hours 45 minutes and at 4 hours 54 minutes p.m., 26 degrees 33 minutes West. Variation of the Compass 4 degrees 7 minutes West, and the Observed Latitude at Noon to the Northward of the Log 7 Miles. Wind South-East to South-South-East; course South 58 degrees West; distance 57 miles; latitude 2 degrees 46 minutes North, longitude 27 degrees 11 minutes West; at noon, Bonavista South-East point, North 21 degrees East, 281 leagues.

Joseph Banks Journal
Trade continues. Today the cat killd our bird M. Avida who had lived with us ever since the 29th of Septr intirely on the flies which he caught for himself; he was hearty and in high health so that probably he might have livd a great while longer had fate been more kind.

Sydney Parkinson’s Journal
On the 21st, we reached the S. E. trade wind, and continued our course without any remarkable occurrence till the 8th of November…

The trade winds (also called trades) are the prevailing pattern of easterly surface winds found in the tropics, within the lower portion of the Earth's atmosphere, in the lower section of the troposphere near the Earth's equator. The trade winds blow predominantly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere, strengthening during the winter and when the Arctic oscillation is in its warm phase. Historically, the trade winds have been used by captains of sailing ships to cross the world's oceans for centuries, and enabled European empire expansion into the Americas and trade routes to become established across the Atlantic and Pacific oceans.

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