This guild of gnomes has catapults and giant nets carefully arranged in Teleleli, and various other cities. Specially trained horses and riders are flung by the catapults, to land in the nets at their destination. They carry parcels and letters, which is how the guild makes its money.
Every so often a horse will arrive on time, but without its rider or parcels. It is said that those hired to investigate have found nothing, or have disappeared themselves. One theory is that some villainous personage is firing a magnetic ray to cause the ponies to fly off course.
These losses have led to a rise in popularity of the carrier parrot. This system is more expensive, but has the advantage that a well-trained parrot will not speak its message unless it arrives at its proper destination. Thus no third party can learn the message by intercepting the bird.