Angelic forms or choirs have so often been with me and been heard that it has become a familiar occurrence, so that not all the particulars I have been able to observe have been recorded, such as that some learn to flow without being portrayed by mental images into those forms so as to be initiated and enabled thereafter to be among the spiritual and heavenly; or that choirs from the Mohammedans have become so familiar to me that just from the sound I could tell it was from them-among other things, as when they streamed into a roaring sound, without speech.