Studies in French concerning the three great prophets (Isaiah, Jeremiah, Ezekiel) are not very numerous. Some in English are available for English-speaking readers. The present document is the result of personal notes taken from various serious and well-known authors: J. N. Darby, W. Kelly, F. W. Grant, A. C. Gaebelein, H. A. Ironside and H. Rossier. The notes on the detailed structure of the book of Isaiah, by H. Rossier, of remarkable clarity, have been reproduced in large part.