and hence has been dubbed by the voyageurs "the Sail Rock" (Fig. 33).

A mile farther east we reach "The Grand Portal" (Fig. 34). This is an enormous arched gateway one hundred feet in height and one hundred and sixty feet broad, opening into a magnificent vaulted passage some three hundred feet deep, and expanding into a massive dome. These apartments, with their ramifications, have been hewn in an enormous quadrangular block of brown sandstone projecting sheer into the lake six hundred feet, and presenting a front of three or four hundred feet, with a frowning façade lifted full one hundred and thirty-three feet above the

water which bathes the foundations and resounds through the vaulted passages of this most magnificent of Nature's cromlechs.

The last and most grotesque of these mural structures is "The Chapel." At the height of forty feet above the lake

is a rocky floor, from the four angles of which rise curiously wrought columns of masonry in thin and regular courses. These support a massive vaulted roof that covers a rustic auditorium forty feet in diameter and forty feet high, which suggested the name of the structure. At the base of one of the columns is excavated an arched niche, which may be

and hence has been dubbed by the voyageurs "the Sail Rock" (Fig. 33).

A mile farther east we reach "The Grand Portal" (Fig. 34). This is an enormous arched gateway one hundred feet in height and one hundred and sixty feet broad, opening into a magnificent vaulted passage some three hundred feet deep, and expanding into a massive dome. These apartments, with their ramifications, have been hewn in an enormous quadrangular block of brown sandstone projecting sheer into the lake six hundred feet, and presenting a front of three or four hundred feet, with a frowning façade lifted full one hundred and thirty-three feet above the

water which bathes the foundations and resounds through the vaulted passages of this most magnificent of Nature's cromlechs.

The last and most grotesque of these mural structures is "The Chapel." At the height of forty feet above the lake

is a rocky floor, from the four angles of which rise curiously wrought columns of masonry in thin and regular courses. These support a massive vaulted roof that covers a rustic auditorium forty feet in diameter and forty feet high, which suggested the name of the structure. At the base of one of the columns is excavated an arched niche, which may be