An introduction to the skill of musick in two books : the first, the grounds and rules of musick, according to the gam-ut, and other principles thereof, the second, instructions & lessons for the bass-viol, and instruments & lessons for the treble-violin / by John Playford ; to which is added, The art of descant, or composing musick in parts, by Dr. Tho. Campion ; with annotations thereon, by Mr. Chr. Simpson.

CHAP. III. A brief Rule for proving the Notes in any Song or Lesson.

FIrst observe with which of the three u∣sual Cliffs your Song or Lesson is signed with at the beginning, if it be with the G sol re ut Cleave, then if the Note be above it, whose name and place you would know, you must begin at your Cliff, and assign to every Rule and Space a Note, according to the Rule of your Gam-ut, ascending till you come to that Rule or Space where the same Note is set: But if the Note be below your Cliff, then you must prove downwards to it, saying your Gam-ut backwards, assig∣ning to each Rule and Space a Note, till you come to its place. So that by knowing in what place of your Gam-ut the Note is set, you will easily know its name, the next Cha∣pter directing you an infallible Rule for it, and that by an easie and familiar Example.