Our mules waited for us on the left bank of the Orinoco. The plant collections and geological specimens brought from Esmeralda and the Río Negro had greatly increased our baggage. It would have been dangerous to leave our herbals behind, but this added weight meant we now faced a tediously slow journey across the llanos. The heat was excessive due to the bare ground's reverberations. The thermometer by day recorded between 30°C and 34°C, and at night 27°C to 28°C. Like everywhere in the Tropics it was less the actual degree of heat than its duration that affected our bodies. We spent thirteen days crossing the steppes, resting a little in the Carib missions and in the village of Payo.