view of the sea, the Island of Catanduanes, and the plain of Tabaco. [Prison as hotel.] At sunset we reached Tibi, where I quartered myself in the prison.  This, a tolerably clean place, enclosed with strong bamboos, was the most habitable part of a long shed which supplied the place of the tribunal destroyed in a storm two years before.  At Tibi I had an opportunity of sketching Mount Malinao (called also Buhi and Takit), which from this side has the appearance of a large volcano with a distinct crater.  From the lake of Buhi it is not so clearly distinguishable.

[Igabo hot spring.] Not far from Tibi, exactly north-east of Malinao, we found a small hot spring called Igabo.  In the middle of a plot of turf encircled by trees was a bare spot of oval form, nearly a hundred paces long and seventy wide.  The whole space was covered with stones, rounded by attrition, as large as a man’s head and larger.  Here and there hot water bubbled out of the ground and discharged into a little brook; beside it some women were engaged in cooking their food, which they suspended in nets in the hottest parts of the water.  On the lower surfaces of some of the stones a little sulphur was sublimated; of alum hardly a trace was perceptible.  In a cavity some caolin had accumulated, and was used as a stain.

[Naglegbeng silicious springs.] From here I visited the stalactite springs, not far distant, of Naglegbeng. [105] I had expected to see a calcareous fountain, but found the most magnificent masses of silica of infinite variety of form; shallow cones with cylindrical summits, pyramidal flights of steps, round basins with ribbed margins, and ponds of boiling water.  One spot, denuded of trees, from two to three hundred paces in breadth and about five hundred in length, was, with the exception of a few places overgrown with turf, covered with a crust of silicious dross, which here and there formed large connected areas, but was generally broken up into flaky plates by the vertical springs which pierced it.  In numerous localities boiling hot mineral water containing silica was forcing itself out of the ground, spreading itself over the surface and depositing a crust, the thickness of which depended on its distance from the center point.  In this manner, in the course of time, a very flat cone is formed, with a basin of boiling water in the middle.  The continuous deposit of dross contracts the channel, and a less quantity of water overflows, while that close to the edge of the basin evaporates and deposits a quantity of fine silicious earth; whence the upper portion of the cone not only is steeper than its base, but frequently assumes a more cylindrical form, the external surface of which on account of the want of uniformity in the overflow, is ribbed in the form of stalactites.  When the channel becomes so much obstructed that the efflux is less than the evaporation, the water ceases to flow over the edge, and the mineral dross, during the continual cooling