fig1 8 the basic course to course interlocking structure of the mortarless brick of the present invention is shown as can be seen the brick of the present invention has flat vertical front 1 and rear 2 faces the top surface of each brick is defined by a ridge 3 that interfits with a groove 4 on the lower surface of the brick ridge 3 is of greater height than groove 4 to provide the visual appearance of a mortar line 5 between courses of bricks as can best be seen in fig3 and 27 ridge 3 is preferably provided with a forwardly sloped portion 6 and a rearwardly sloped portion 26 the sloped portions 6 26 of ridge 3 permit water that may enter between the courses to drain from between stacked bricks a lap joint that is formed between adjacent bricks in a row by the overlap of front 8 and rear 7 end flanges of adjacent bricks moreover as can be seen from fig5 and 27 front end flange 7 of a brick is recessed from the front face 1 of a brick to present the appearance of a mortar line 9 between adjacent bricks in a row corner bricks according to the present invention are illustrated in fig9 17 the outside comers of fig9 and 10 and the inside comers of fig1 and 14 are basically the same brick as illustrated in fig1 8 but angulated.