The Viscounty of Cabrera had its own forms of government; it was administered by agents of power in the service of the viscounts – from the notary to the judge, including the general procurators and other officials – who ensured the governability of the territory. The material remains of this administration and its works of government are still visible at various points throughout the viscounty.

The Sils lagoon covered an area of approximately seven square kilometres and on old maps it is often depicted as larger than that of Banyoles. A document from 1660 contains the concession by the Viscount of Cabrera, Guillem Ramon de Montcada, to harvest the ice in favour of Francesc Villar (owner of an ice well in Maçanet), in exchange for an annual payment of thirty-five pounds and two sous in Barcelona currency. In 1740 the Duke of Medinaceli, husband of the Viscountess of Cabrera, Maria Teresa de Montcada, had boundary markers set up to mark the limits of the lake. Its process of desiccation (with various attempts since the 13th century) was not successfully completed until the improvement works on the irrigation canal’s drainage system, initiated in 1845 and completed in 1856, were finished. These works made the passage of the train possible, a pivotal event in the history of Sils.

Other terms are also found at the pond. Some are indicative of an important property of the Cathedral of Girona (with the inscription ANIVR Pxs DE LA SEU DE GERO) and a third type, dated 1766, with an inscription that reads “Drained pond” by the Most Excellent Lord Marquis of Aitona. 1766. These last ones were meant to record the water level in 1766, before the work was actually completed in 1768.