▁the ▁other ▁notes ▁of ▁the ▁music ▁appropri ately ▁fitted ▁to ▁the ▁words ▁at ▁the ▁end ▁of ▁each ▁half - verse . ▁Form er ly ▁the ▁rh ythm ▁of ▁the ▁non - rec iting ▁notes ▁was ▁strictly ▁observed , ▁but ▁now ad ays ▁the ▁rh ythm ▁is ▁based ▁on ▁the ▁natural ▁cad ence ▁of ▁speech . ▁Thus , ▁the ▁length ▁of ▁each ▁of ▁these ▁notes ▁be ars ▁little ▁relation ▁to ▁the ▁normal ▁musical ▁value ▁of ▁a ▁note ▁such ▁as ▁a ▁minim ▁or ▁semi - bre ve . ▁ ▁Ang lic an ▁chant ▁was ▁well ▁established ▁by ▁the ▁ 1 8 th ▁century . ▁The ▁earliest ▁known ▁examples ▁are ▁single ▁ch ants ▁written ▁by ▁John ▁B low , ▁Henry ▁Pur cell , ▁and ▁their ▁contempor aries . ▁Ear lier ▁examples ▁by ▁T ud or ▁compos ers ▁such ▁as ▁T all is , ▁F arr ant , ▁and ▁others ▁are ▁not ▁original . ▁The ▁earliest ▁double ▁ch ants ▁are ▁from ▁about ▁ 1 7 0 0 . ▁ ▁Method ▁ ▁The ▁text ▁is ▁pointed ▁for ▁chant ing ▁by ▁assigning ▁each ▁verse ▁or ▁phrase ▁to ▁a ▁simple ▁harm on ised ▁mel ody ▁of ▁ 7 , ▁ 1 4 , ▁ 2 1 ▁or ▁ 2 8 ▁bars ▁( known ▁respectively ▁as ▁a ▁single , ▁double , ▁triple ▁or ▁quad ru ple ▁chant ). ▁ ▁An ▁example ▁of ▁a ▁single ▁chant ▁is ▁shown ▁above . ▁Below ▁are ▁the ▁first ▁four ▁vers es ▁of ▁the ▁Magn ific at , ▁with ▁the ▁text ▁col oured ▁to ▁show ▁which ▁words