book on bricklaying. Firstly I removed all the rubble from the collapsed wall and cleared the site. From the book on how to build a wall, I dug out a trench a foot deep using a length of string as a straight edge. Position the string in a line where you want the front of the bricks to line up. Tie the string around a brick and lay it down at the place where you want your first brick to lay. Stretch the string until the line is straight then weigh down the far end of the string with a brick. Dig out the foundation. You now have a trench with a nice straight front. Mix up concrete using three parts sand, two parts gravel and one part cement. Thoroughly mix these together either by hand as I did, or hire a cement mixer for a few days. When its mixed, add water to form a nice sloppy concrete. Fill the trench with your concrete so it comes just below ground level. Smooth it out and lay a length of timber on top and level it with a spirit level. Once you have a fairly level surface remove the length ot timber and leave the concrete for 24 hours to harden. This is the footing for your brick wall. All your bricks will rest on this and the concrete will distribute the weight of the brickwork over its area. If rain threatens, cover the trench with plastic and weigh down