The expedition was similar to the previous journeys in most aspects, but this time he was also ordered to find the best place to grow walnut and Swedish whitebeam trees; these trees were used by the military to make rifles.
A expedición era similar ás viaxes previas na maioría dos aspectos, pero esta vez tamén se lle ordenou que atopase o mellor lugar de cultivo para nogueiras e sorbeiras suecas, árbores que acostuman ser utilizadas polos militares para fabricar rifles.