"Drink deep, or taste not the Pierian spring," was the suggestion of Pope; and if Mr. Bishop or any of those who have been sipping at this fountain of knowledge would call upon me (at 6 James Street, Franklin Square) I would take pleasure in showing them the unsuspected extent of their own powers, and showing how thoroughly the questions they are interested in were investigated over forty years ago, to scatter the mystery and bring the wonderful and almost incredible powers of the mind into correlation with biology and anatomy. I might show them, too, that mind-readers are not such extraordinary persons as they are commonly supposed. There are many millions in the world who can exercise the class of faculties to which mind-reading belongs--a class of faculties long neglected by superficial scientists, from the cultivation of which more may be expected for the future intellectual progress of mankind than from anything else now known to the universities. I mean no disrespect in styling Mr. Bishop a sciolist (or undeveloped scientist). That very sciolism brought him into sympathy with Dr. Carpenter and other distinguished gentlemen who would not have listened to him if he had come in any nobler manner, and enabled him to open their eyes. Perhaps if he will take another step in advance he can lead the majority of his pupils to a higher position, and thus render a signal service to society. I hope he will have the candor and courage to advance far beyond his present position. JOS. RODES BUCHANAN. Since Mr. Bishop's exhibitions have been so successful and profitable, several others have repeated his performances of telling the number of a bank note, finding hidden articles, and going through any performance that was enacted during his absence from the hall. Mr. Montague, an editor of the _Globe_, Mr. George, Mr. Wilder, and several others have shown the same powers. A dispatch from St. John, New Brunswick, to the _Herald_ describes a remarkable performance at that place as follows: