My apprentice, Ellynor Redpath, is full of ideas. Most of the time, her brilliant notions involve skills well beyond my own (I can barely manage a straight stitch), but this one? This one was dangerously right up my alley: playing with caustic materials. Seriously, what’s the worst that could happen when you deliberately handle a substance that dissolves flesh? Exactly. What Had Happened Was… The Diaper Rabbit Hole Ellynor and I were deep in discussion about one of her latest research projects when, as often happens, we tumbled down a very specific rabbit hole. We went from discussing baby garments in Elizabethan England straight into the vital, if somewhat less…