In order to give some idea of the care taken in the reproduction of these subjects, it may be stated that (except where the original paintings themselves were accessible) in every case an accurate copy in oils was painted by a skillful artist, and this, together with photographs from the original pictures, the best impressions of the best engravings, etc., formed the basis on which Jehenne, the artist-lithographer, founded his conscientious work. Each subject is produced by a series of color-printings, the average number of stones to each picture being fifteen. The delicacy and difficulty of this art may be the better appreciated by remembering that, while the painter has always at hand his palette, with its numberless pigments of color and shades of color, for the patient elaboration of the picture, the lithographer has to analyze the work which has thus grown up by infinite touches under the painter's brush, and must study to concentrate as much as possible the effects of each single color in a single stone,--which can print or touch the picture but once. The final effect is of course produced by the superposition of colors and shades of color one upon another; but the art which can thus transfer the painter's minute and painful toil to the breadth and rapidity of mechanical reproduction, making accessible to thousands the designs in form and ideas in color of the creating genius, instead of leaving them imprisoned in the single copy which only the rich purchaser may possess,--this is also a true art, and claims the recognition of true lovers of art. Below is given a descriptive list of the subjects, pictures, and artists of the illustrations in the present publication. No. I. _Mary, the Mother of our Lord._ FRED. GOODALL (England, b. 1822). This presentation of the Virgin, going into the temple with her offering of two doves, is one of the most delicate and beautiful of the entire series. The exceeding simplicity of design and of coloring gives it an effect of purity, while the face is tender, thoughtful, and in every way attractive. The softness of the drapery and the gentle gradations of light are especial features. II. _Hagar and Ishmael._ CHRISTIAN KOEHLER (Werben, Germany, b. 1809; d. 1861). This picture is strong and expressive rather than attractive. The depth of the greenish-blue sky and the barrenness of the indicated landscape give an intensity to the desolateness of the mother, clasping the form of her sturdy and unconscious little outcast son. The original painting is now in the Civic Gallery, at Düsseldorf, on the Rhine. It was painted at Leinwald in 1843. III. _Rebekah._ CHARLES LANDELLE (Laval, France, b. 1815).