Attention has been called to the attitude of the writings of the Anglo-Saxon Church Father, the Venerable Bede. Although we have no unquestionable proof that Bede, or Alcuin,[77] who was greatly influenced by him, insisted on the use of globes in geographical instruction, there is good reason for thinking these scholars would have inclined to encourage their use. The monastic schools, which, in the methods of instruction, rested upon the plan wrought out by Alcuin for the Palace School of Charles the Great, considered globes to be apparatus of great educational value. Professor Günther is inclined to think it probable that celestial globes were used throughout the early centuries of this mediaeval period in the better schools, though no positive statement to that effect can be cited.[78] We know that an exact knowledge of the movements of the sun, of the moon, and of the constellations was considered to be of first importance for the priesthood in the middle ages, since it was through a knowledge of their movements that the times for the observance of the rigid church rules were fixed.[79] The acquisition of such knowledge could best be secured through the use of the celestial globe.[80] We learn from Notker Labeo (950-1022), one of the most distinguished teachers of the monastic school of St. Gallen, that he made use of such globes for astro-geographical instruction, which, in their important features, were like our modern celestial globes, for he tells us “they were supplied with all necessary parts.” It seems evident that those of which he made use could be adjusted to every desired altitude of the pole.[81]