▁from ▁the ▁Archives ▁of ▁O bl iv ion , ▁featuring ▁two ▁tracks ▁recorded ▁at ▁that ▁concert , ▁soon ▁followed . ▁ ▁P ink ▁F loyd ' s ▁ 1 9 7 5 ▁release ▁W ish ▁You ▁W ere ▁Here ▁saw ▁Har per ▁sing ▁lead ▁vocals ▁on ▁the ▁song ▁" Have ▁a ▁C ig ar ". ▁Roger ▁W aters ▁intended ▁to ▁record ▁the ▁part ▁himself , ▁but ▁had ▁stra ined ▁his ▁voice ▁while ▁recording ▁" Sh ine ▁On ▁You ▁Cra zy ▁Diam ond " ▁and ▁David ▁Gil m our ▁decl ined ▁to ▁sing . ▁Har per ▁was ▁recording ▁his ▁album ▁H Q ▁in ▁Studio ▁ 2 ▁of ▁Ab bey ▁Road ▁at ▁the ▁same ▁time ▁as ▁P ink ▁F loyd ▁were ▁working ▁in ▁Studio ▁ 3 ; ▁learning ▁of ▁the ▁band ' s ▁d ile m ma , ▁Har per ▁offered ▁to ▁sing ▁the ▁lead . ▁The ▁song ▁is ▁one ▁of ▁only ▁two ▁songs ▁by ▁P ink ▁F loyd ▁not ▁s ung ▁by ▁one ▁of ▁their ▁permanent ▁members ▁( the ▁other ▁one ▁being ▁The ▁Great ▁G ig ▁in ▁the ▁Sky ). ▁David ▁Gil m our ▁returned ▁the ▁favour ▁by ▁appearing ▁on ▁H Q , ▁along ▁with ▁Har per ' s ▁occas ional ▁backing ▁band , ▁' Trigger ' ▁( Chr is ▁Sp ed ding , ▁Dave ▁C och ran , ▁Bill ▁Bru ford ▁and ▁John ▁Paul ▁Jones ). ▁The ▁single ▁" When ▁an ▁Old ▁Cr ick eter ▁Le aves ▁the ▁Cre ase ", ▁taken ▁from ▁H Q , ▁is ▁one ▁of ▁Har per ' s