But the screen served a third purpose, and that was eminently practical. On it sat the orchestra and choir. The gallery was made broad and solid to support them, and was furnished with a back to the west, against which the performers might lean, and which concealed them from the congregation in the nave. These backs have for the most part disappeared; nevertheless, several remain. They naturally were the first part of a screen to give way through the pressure of somnolent human beings against it.
The choir and instrumentalists sat on the rood-screen, where they could see every movement of the priest at the altar, and so take their cues for singing and playing. It was essential that they should be in this position. In Continental churches, where in many places the screens have been mutilated or removed, the choirs still occupy their old places. For instance, at Bruges, where the screen in the cathedral is reduced to a mere block of black and white marble beside the chancel steps, the musicians remain perched at the top. At Freiburg, where the screen and gallery have been erected in one of the transepts, quite out of sight of the altar, the singers and orchestra are on it.
At the Reformation, when the crucifix was torn away, a great ugly gap was left in the gallery-back above the screen. In cathedrals this gap was filled up with the organ. And in cathedrals and large churches the organ displaced the instrumentalists.
In many churches the screen itself was destroyed or allowed to fall into decay. But the use of the gallery was not forgotten. The priest now occupied the reading-desk, and as this was very generally in the body of the church, something had to be done to bring the choir and orchestra into a suitable position facing him.
Accordingly, in a great number of cases the gallery was removed to the west end of the church, and those who rendered the musical portion of divine service moved with it. Hence it came about that in a vast majority of cases the gallery at the west end, under the tower arch, came to be the great focus and centre of music and discord.
Now the fashion has set in everywhere to pull down the west gallery and open out the tower arch. But when the west gallery is gone, whither is the organ to go? Where is the choir to be put? The choirs are now very generally accommodated in the chancel, but the organ has been moved about into various places more or less unsuitable.
At one time the fashion was to build out a sort of chapel on the north side and to fit the organ into it; boxing it up on all sides but one. Naturally, the organ objected to this treatment. It was made to occupy an open space: it demanded circulation of air. In the pocket into which it was thrust it became damp, and went out of tune.
Nothing could have been designed more senseless than these cramped chapels for organs. The organ sets waves of air in motion, and the walls boxing in the pipes prevented the waves from flowing. It was found that organs in this position did not give forth a volume of sound commensurate with their cost and size, and they were pulled out, and stuck in side aisles, and painted and gilt, and an attempt made to render an unsightly object comely by flourish of decoration.
But again difficulties and objections became evident. An organ ought not to be on the damp floor, and it ought to be well elevated. Moreover, planted at the east end of an aisle, it did not support the congregation in their singing. It roared and boomed in the ears of the choir; and if the service is to be an elaborate performance, in which the congregation takes the part of audience only, then it is in the right place. But if the divine worship is to be congregational, if all are to be encouraged to sing, then the organ is out of place.
Consequently in a good many cases there is a talk of moving back the organ into a west gallery.