The roof was highpitched and covered with straw, hay, reeds or tiles.
The Rockanje Lake near Brielle is remarkable for the strong salty solution which covers even the growing reeds with a 1 The datum plane, or basis of the measurement of heights, is throughout Holland, and also in some of the border districts of Germany, the Amsterdamsch Peil (A.P.), or Amsterdam water-level, and represents the average high water-level of the Y at Amsterdam at the time when it was still open to the Zuider Zee.
Along this part of its course the river is apt to be choked with reeds and, except where bordered by lines of palm trees, the channel loses itself in lakes and swamps.
The dwellings of the primitive settlers in the lagoons were, in all probability, rude huts made of long reeds, such as may be seen to this day in the lagoon of Grado.
The truth is, without doubt, that the dwellings of the lower classes were still built of reeds and mud, and covered the greater part of the city's area, otherwise it is impossible to understand how a mere handful of Spanish soldiers, without tools and explosives, could so easily have levelled it to the ground.