FIG. 1 is a rear elevation view of a first brick of a set of bricks in accordance with my invention.

FIG. 2 is a front elevation thereof;

FIG. 3 is a top plan view thereof.

FIG. 4 is a bottom plan view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a perspective view thereof from the upper right.

FIG. 8 is a perspective view thereof of the bottom left.

FIG. 9 is a perspective view thereof from the upper left.

FIG. 10 is a longitudinal cross section thereof taken along line 10—10 of FIG. 3.

FIG. 11 is a transverse cross section thereof taken along line 11—11 of FIG. 3.

FIG. 12 is a rear elevation view of a second brick of a set of bricks in accordance with my invention.

FIG. 13 is a front elevation thereof.

FIG. 14 is a top plan view thereof.

FIG. 15 is a bottom plan view thereof.

FIG. 16 is a left side elevation view thereof.

FIG. 17 is a right side elevation view thereof.

FIG. 18 is a perspective view thereof from the upper, right rear.

FIG. 19 is a perspective view thereof of the bottom, front left.

FIG. 20 is a perspective view thereof from the upper left.

FIG. 21 is a longitudinal cross section thereof taken along line 21—21 of FIG. 14.

FIG. 22 is a transverse cross section thereof taken along line 22—22 of FIG. 14.

FIG. 23 is a transverse cross section thereof taken along line 23—23 of FIG. 14.

FIG. 24 is a rear elevation view of a third brick of a set of bricks in accordance with my invention.

FIG. 25 is a front elevation thereof.

FIG. 26 is a top plan view thereof.

FIG. 27 is a bottom plan view thereof.

FIG. 28 is a left side elevation view thereof.

FIG. 29 is a right side elevation view thereof.

FIG. 30 is a perspective view thereof from the upper, right rear.

FIG. 31 is a perspective view thereof of the bottom, front left.

FIG. 32 is a perspective view thereof from the upper, left.

FIG. 33 is a longitudinal cross section thereof taken along line 33—33 of FIG. 26.

FIG. 34 is a transverse cross section thereof taken along line 34—34 of FIG. 26.

FIG. 35 is a transverse cross section thereof taken along line 35—35 of FIG. 26.

FIG. 36 is a rear elevation view of a fourth brick of a set of bricks in accordance with my invention.

FIG. 37 is a front elevation thereof.

FIG. 38 is a top plan view thereof.

FIG. 39 is a bottom plan view thereof.

FIG. 40 is a left side elevation view thereof.

FIG. 41 is a right side elevation view thereof.

FIG. 42 is a perspective view thereof from the upper, right rear.

FIG. 43 is a perspective view thereof of the bottom, front left.

FIG. 44 is a perspective view thereof from the upper left.

FIG. 45 is a longitudinal cross section thereof taken along line 45—45 of FIG. 38.

FIG. 46 is a transverse cross section thereof taken along line 46—46 of FIG. 38.

FIG. 47 is a transverse cross section thereof taken along line 47—47 of FIG. 38.

FIG. 48 is a rear elevation view of a fifth brick of a set of bricks in accordance with my invention.

FIG. 49 is a front elevation thereof.

FIG. 50 is a top plan view thereof.

FIG. 51 is a bottom plan view thereof.

FIG. 52 is a left side elevation view thereof.

FIG. 53 is a right side elevation view thereof.

FIG. 54 is a perspective view thereof from the upper, front right.

FIG. 55 is a perspective view thereof of the bottom, front right.

FIG. 56 is a longitudinal cross section thereof taken along line 56—56 of FIG. 48.

FIG. 57 is a transverse cross section thereof taken along line 57—57 of FIG. 48.

FIG. 58 is a rear elevation view of a sixth brick of a set of bricks in accordance with my invention.

FIG. 59 is a front elevation thereof.

FIG. 60 is a top plan view thereof.

FIG. 61 is a bottom plan view thereof.

FIG. 62 is a left side elevation view thereof.

FIG. 63 is a right side elevation view thereof.

FIG. 64 is a perspective view thereof from the upper, right rear.

FIG. 65 is a perspective view thereof of the bottom, front left.

FIG. 66 is a perspective view thereof from the upper left.

FIG. 67 is a longitudinal cross section thereof taken along line 67—67 of FIG. 60.

FIG. 68 is a transverse cross section thereof taken along line 68—68 of FIG. 60.

FIG. 69 is a transverse cross section thereof taken along line 69—69 of FIG. 60.

FIG. 70 is a rear elevation view of a seventh brick of a set of bricks in accordance with my invention.

FIG. 71 is a front elevation thereof.

FIG. 72 is a top plan view thereof.

FIG. 73 is a bottom plan view thereof.

FIG. 74 is a left side elevation view thereof.

FIG. 75 is a perspective view thereof from the upper, left front.

FIG. 76 is a perspective view thereof of the bottom, front left.

FIG. 77 is a perspective view thereof from the upper, right front.

FIG. 78 is a transverse cross section thereof taken along line 78—78 of FIG. 72.

FIG. 79 is a longitudinal cross section thereof taken along line 79—79 of FIG. 72; and,

FIG. 80 is a cross-sectional view thereof taken along line 80—80 of FIG. 72.