I often find myself telling people that their compost heaps will "sink" as they rot, and often, they don't quite believe me, or they don't quite understand what I mean.
So here is a pair of photos to illustrate how much a compost heap can sink in a week.
Much of the material is sopping wet, hence the mud splashed all over the front of the grid.
(And I would just draw your attention to the right-hand pen, and the mass of beautiful compost waiting to be used, and do please admire how neat and tidy it all is.)
Good thing too - as you can see, there are barrowloads more of material to go onto it!
(And yes, this is a two-wheelbarrow garden. Lucky me!)
So there you have it, that's how much a compost heap can sink in just a week!