Piscina Window.
The little window over the Piscina tells of the vision of Isaiah (Isaiah vi. 11). “Then flew one of the seraphims, having a live coal in his hand, which he had taken with the tongs from off the altar: and he laid it upon my mouth, and said, Lo, this hath touched thy lips and thine iniquity is taken away, and thy sin purged.” Close to this little window is the Holy Table, from which is to be daily given the body and blood of our Lord Jesus Christ for the preservation of body and soul unto everlasting life, and it has seemed appropriate to tell nearby in stained glass the story of that earlier cleansing by the coal from off the altar.