Plate XCIX. Grottoes

Plate XCIX. — No. I is an illustration of a grotto formed in the hill-side between two levels: it is of the hemicycle type with an interior screen of columns masking niches planned on the radial lines, the double staircase meeting above the entrance. No. II shows a more complex rendering, the chief feature being a colonnade combined with dual stairways to the higher level. No. III shows another of the hemicycle type with a screen of columns and stepped approach. No. IV follows the same theory, but includes subordinate niches and a vaulted loggia. No. V consists of an arcaded and saucer domed loggia of three bays with five semi-circular recesses. No. VI shows a simple recess forming a feature in an arcaded and domed loggia: this type could be introduced at recurring intervals. No. VII combines elements of all the foregoing in a grand scheme of grotto, canal, basin, fountain and steps.