These _serdabs_ communicated neither with each other nor with the chapel; and are, as it were, buried in the masonry (fig.

131).

If connected at all with the outer world, it is by means of an aperture in the wall about as high up as a man's head (fig.

132), and so small that the hand can with difficulty pass through it.

To this orifice came the priests, with murmured prayers and perfumes of incense.