I prepared all the stuff for the drawers; rebated the sides for the bottoms, grooved the fronts for the bottoms and cut the dovetails. The boards for the drawer bottoms were planed down to 1/4″ thickness and rubbed together in threes. I began gluing the drawers together and notwithstanding the high winds and forecast of rain, I whipped the tarpaulin off the carcase so I could rest the drawer shells in it to ensure they set-up perfectly square.
I trimmed the drawer bottoms to size, cleaned them up with a plane and then slid their front edges into the grooves in their respective drawer fronts, nailed and glued them into the side rebates and nailed them to the undersides of the drawer backs. Lastly, narrow runners were rubbed into the side rebates/undersides of the drawer bottoms.
When all was dry, I planed the runners/rebates down just enough to allow a modest clearance between the bottom edges of the drawer fronts and drawer dividers.