This medium grille if examined on the face is quite different from the foregoing large grille. It appears to be composed of raised lines between the squares and depressed crosses in them. A glass transforms these lines into rows of diamonds. On the reverse it appears as if composed of depressed lines, between the squares, and raised crosses in them. _Note._ The other values so far as known, have not been found with this grille. Up to May, 1868, only the values from 1 to 12 cents had been noted by the stamp papers as having been found with any grille. The 24 and 30 cents are chronicled with a grille in the November, 1868, but the 90 cents was not so noticed until much later, February, 1869, (see American Journal of Philately). The fourth and most common grille is a square of 9 by 14 mm., composed of 12 rows of 16½ squares each. The date of its adoption is not known. It was applied to the whole series. 1 cent, blue, perforated 12, small grille. 2 " black " 12 " 3 " rose " 12 " 5 " brown " 12 " 10 " green " 12 " 12 " black " 12 " 15 " black " 12 " Nov. 1868, 24 " lilac " 12 " " 30 " orange " 12 " Feb. 1869, 90 " blue " 12 " _Varieties._ 9 by 14 mm., 12 by 16½ rows, 1c., perf. 12. " " " 3c " " 12 by 17 " 30c " OBSERVATIONS. The colors are generally stronger than in those without the grille. The majority of the specimens of these stamps appear to have the surface of the paper tinted slightly with the color of the stamps, possibly from some imperfection in cleaning the plates. A few values have been noted on pure white paper. 1 cent, blue, small grille, perforated 12. 2 " black " " 12 10 " green " " 12 The 3 cents, rose, small grille, unperforated, has been noted, and 2 cents, black, grille, variety 4 { unperforated 3 " rose " " 4 { at the 5 " brown " " 4 { sides. The re-impressions of these designs did not have the grille. The five cents was in use up to September, 1870. Some specimens examined seem to indicate that all these varieties of grille are occasionally to be found reversed, i. e. they present the appearance on the face that is usually to be seen on the back, and vice versa. Of these stamps with the grille, there were, issued approximately the following numbers: