Sadler's Wells, LondonThe Irish choreographer and his company, TeaÄ‹ Daá¹sa, weave dances of folksy complexity in their stirring, absurdist new production In eight weeks at their home base in south-west Kerry, Michael Keegan-Dolan and his company, TeaÄ‹ Daá¹sa, created this keening yet often stirring new piece about death, betrayal and loss. Its title comes from William Blake " his name for a vengeful d…