Photograph of the aqueduct at Belem in Brazil in the late 19th or early 20th century.

Photograph of a man demonstrating the Brazilian method of curing Para rubber by holding it in a cup over a campfire in the early 20th century.

Illustration of instruments used by Brazilian rubber collectors: a) a 'Machadinha' (small axe) for tapping; b) collecting cup; c) collecting vessel intowhich contents of cups are poured; e) saucer by means of which latex is poured over paddle f during smoking process. The paddle f (to the left) is shown covered with a layer of rubber.

Letter to Sir Archibald Geikie from John Ball asking him if he could recommend a source of information on the geology of the Brazilian interior.

Photograph of an Ongole heifer that was sent to Brazil grazing in a paddock in the late 19th or early 20th century.

Sketch of a map of the Amazon valley indicating the locality on the Tapajos plateaux where the original stock of the plantation Hevea came from in 1876.