Gradually José learned to help his parents and, by the time he was fourteen, he was able to do most of the tasks expected of young men. He accompanied his father Francisco on trips to the hills in search of natural products. The leaves of the agave were one of the most sought-after materials. These they carried home, stripped off the soft green exterior and put the strong interior fibers to dry. This was called ixti, and from it all kinds of cord and rope were made. Many hours José sat, twisting the wheel with which his father made rope. At other times he helped to make adobe bricks, mixing the mud to a proper consistency, pressing it into moulds and leaving it in the sun to dry. His father likewise taught him to weave strong sacks of ixti cord on a simple loom.