Hope for my iris...

There were four irises when we moved in five years ago. The dark purple one has consitently bloomed, while the pink/purple one has sometimes bloomed. I can't remember what the third one was, because it only bloomed the one time and then went dormant/eaten by something/dug up by accident :-D Such was the case with the fourth one, the yellow iris. Two years ago I transplanted it to a different part of the flowerbed and nothing happened for two summers. Well...when I came home today I noticed that about two inches of it had come through! I hope it's the yellow one anyway. Not sure what else it could be though. No sign of the purple crocus, alas.