When summoned, a long time ago, to give evidence in a court of justice, the question was put to me--"Now, doctor, you have heard the symptoms from which the deceased suffered; do you believe that they were produced by arsenic?" Being doubtful about the propriety of the query in a court of law so prudish as ours is, I remained silent, and in an instant the judge, Baron Alderson, said--"I won't allow that question to be put or answered; you want the witness to take the place of the jury, and it shall not be done. You may ask the doctor, if you will, what are the symptoms produced by arsenic, when taken in a poisonous dose, and then it is the business of the jury to compare those, with such as have already been sworn to as occurring in the man before he died." This anecdote is frequently in my mind when I am composing an essay like the present. If I wish to convince the jury who reads my papers of the truth of a particular conclusion to which I have arrived, it is not enough for me to express my own opinions. I may assert, in the matter in question, that I am a skilled witness, and have closely investigated the subject, but it is open to any one to doubt my industry and to distrust my judgment; consequently, it is necessary for me to adduce evidence, as well as to draw deductions therefrom. The hypothesis which I have formed, after a pretty extensive reading, is, that the belief in the mythology of angels which is current amongst Christians at the present time, and which is based upon a series of pretended revelations, said to have been made exclusively to Jews of ancient times, is, in reality, founded upon fancies of pagan priests or poets; and, as a corollary, I infer, either that our celestial mythology must be given up to oblivion, as being heathenish, or that we must abandon those claims to an exclusive inspiration which have been made for, and accorded by many to, the Bible. I have already described the ideas associated with angels in some ancient peoples, and I now propose to examine those of other nations with whom the Jews and Christians, directly or indirectly, came in contact.