From his arrival, Cuéllar began collecting scientific materials to send back to Spain. The first specimens sent back were natural products of the Philippines, including seashells, seeds, resins, woods, drawings, minerals, and some living plants.
Upon arriving in the Philippines, Cuéllar began collecting scientific materials to send back to Spain. Among the first items he sent were natural products like seashells, seeds, resins, woods, drawings, minerals, and some living plants.