FIG. 1 is a front perspective view of the wall retaining block, showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a side elevational view thereof, the other side being a mirror copy of this view;
FIG. 5 is a rear side elevational view thereof; and,
FIG. 6 is a bottom plan view thereof.