The Padre Tembleque aqueduct, or Arcos de Zempoala

A sixteenth-century water conveyance built across the dry plains north-east of Mexico City by one Franciscan and the indigenous communities who supplied the labour, its central arcade still standing when a Mexican government survey reached it in 1864. This entry takes the earliest printed measurements the container could open, prints the two that disagree, and keeps the labour and the later spoliation of the structure beside the achievement.