On the 7th of June we sadly left Father Ramon Bueno. Alone among all the missionaries we met he cared for the Indians. He hoped to return to Madrid to publish the result of his researches into the figures and characters that cover the Uruana rocks. In this area between the Meta, Arauca and Apure, Alonso de Herrera, during the first 1535 expedition to the Orinoco, found mute dogs (perros mudos). We cannot doubt that this dog is indigenous to South America. Different Indian languages have words for this dog that cannot be related to European languages. Early historians all speak of mute dogs, and this same dog was eaten in Mexico and on the Orinoco.

From Puerto Cabello we returned to the Aragua valley, and stopped again at the Barbula plantation through which the new road to Nueva Valencia will pass. Weeks before we had been told about a tree whose sap is a nourishing milk. They call it the 'cow tree', and assured us that negroes on the estates drank quantities of this vegetable milk. As the milky juices of plants are acrid, bitter and more or less poisonous, it seemed hard to believe what we heard, but during our stay in Barbula we proved that nobody had exaggerated the properties of palo de vaca. This fine tree is similar to the Chrysophyllum cainito (broad-leafed star-apple). When incisions are made in the trunk it yields abundant glutinous milk; it is quite thick, devoid of all acridity, and has an agreeable balmy smell. It was offered to us in tutuma-fruit - or gourd - bowls, and we drank a lot before going to bed, and again in the morning, without any ill effects. Only its viscosity makes it a little disagreeable. Negroes and free people who work on the plantations dip their maize and cassava bread in it. The overseer of the estate told us that negroes put on weight during the period that the palo de vaca exudes milk. This notable tree appears to be peculiar to the cordillera Coast At Caucagua the natives called it the 'milk tree'. They say they can recognize the trunks that yield most juice from the thickness and color of the leaves. No botanist has so far known this plant.

We followed the same route as Columbus had taken on his first voyage out to the Antilles. It is well known that during the crossing from Santa Cruz to Cumana, or from Acapulco to the Philippines, sailors barely have to worry about working the sails. We crossed the ocean as if descending a river, and would have been in no greater danger if we had made the voyage in an open boat.

April 12th. We left Carichana at about two in the afternoon and found our way obstructed with granite blocks that break the river current. We passed close to the great reef called Piedra del Tigre. The river is so deep that sounding with a line of 22 fathoms did not touch the bottom. Towards the evening the sky covered over and squalls of wind announced a coming storm. It began to pour so hard with rain that our leafy roof hardly protected us. Luckily the rain scared off the mosquitoes that had been tormenting us all day. We were opposite the Cariven cataract, and the current was so strong that we had great difficulty in reaching land. Time and time again we were pushed back to the middle of the river until two Salivas, excellent swimmers, threw themselves into the water and swam ashore, pulling the boat in until it could be tied to a rock where we spent the night. Thunder rolled all night; the river swelled under our eyes, and we often worried that the furious waves would sink our fragile boat.