“What celestial sign was by both simultaneously observed?

A star precipitated with great apparent velocity across the firmament from Vega in the Lyre above the zenith beyond the stargroup of the Tress of Berenice towards the zodiacal sign of Leo.

How did the centripetal remainer afford egress to the centrifugal departer?

By inserting the barrel of an arruginated male key in the hole of an unstable female lock, obtaining a purchase on the bow of the key and turning its wards from right to left, withdrawing a bolt from its staple, pulling inward spasmodically an obsolescent unhinged door and revealing an aperture for free egress and free ingress.

How did they take leave, one of the other, in separation?

Standing perpendicular at the same door and on different sides of its base, the lines of their valedictory arms, meeting at any point and forming any angle less than the sum of two right angles.

What sound accompanied the union of their tangent, the disunion of their (respectively) centrifugal and centripetal hands?

The sound of the peal of the hour of the night by the chime of the bells in the church of Saint George.

What echoes of that sound were by both and each heard?

By Stephen:

Liliata rutilantium. Turma circumdet.
Iubilantium te virginum. Chorus excipiat.

By Bloom:

Heigho, heigho,
Heigho, heigho.”

Ulysses, Chapter 17:
Ithaca
James Joyce