Peter and John then went to the Valley of Josaphat, and summoned our Lord and the twelve Apostles.

The disciples and friends who were also to make their Pasch in the supperroom, came later.
MEDITATION VI.
The Last Pasch.
Jesus and his disciples ate the Paschal Lamb in the supper-room.
They divided into three groups.

Jesus ate the Paschal Lamb with the twelve Apostles in the supper-room, properly so called; Nathaniel with twelve other disciples in one of the lateral rooms, and Eliacim (the son of Cleophas and Mary, the daughter of Heli), who had been a disciple of John the Baptist, with twelve more, in another side-room.
Three lambs were immolated for them in the Temple, but there was a fourth lamb which was immolated in the supper-room, and was the one eaten by Jesus with his Apostles.

Judas was not aware of this circumstance, because being engaged in plotting his betrayal of our Lord, he only returned a few moments before the repast, and after the immolation of the lamb had taken place.

Most touching was the scene of the immolation of the lamb to be eaten by Jesus and his Apostles; it took place in the vestibule of the supper-room.