Firstly, an ode to the miracle of suction which turned this:
Into this:Minus the books of course, but I was pleasantly flabbergasted to witness the smallifying power of air tight plastic and the common household vacuum. Suddenly enamoured with the sucking and consolidating process, I hauled down more yarn and proceeded to fill the other three bags. Turns out I need... well.... a couple more. Who knew? The important thing is, the stash now looks very very small. (See honey? It's really Not That Much Yarn.) Loose objects are now sticking to it, drawn by the inexorable gravity of its infinitely dense mass, but the stash is clearly little. Meagre even.