Investigation of the currents, chart the third, the South-African current and counter current from the Atlantic to the Indian Ocean

Scale: circa 1:1,500,000 (lat), uncoloured chart in two charts showing ocean currents to the south of Africa. Co-ordinates given, survey tracks marked.

Ships' tracks marked

(parts a and b)
Herefordshire, Capt J.P Wilson, 1819, 1821
[resolution], Capt Cook, 1775

Captains of ships whose tracks are marked

(parts a and b)
Capt Alsager, 1819, 1820, 1821, 1822, 1823, 1824
Dr Davy, 1822
Capt Hamilton, 1819, 1821
Mr Prinsep, 1821

Authorities of the currents (positions, but not tracks marked)

(parts a and b)
[Anna], Capt Horsburgh
[Waterloo], Capt Birch
Capt Beaufort
Capt Torin
Capt L Wilson