“Another story tells how in a time of famine a white cow appeared from the sea and directed the women to take their milk pails to the old stone circle, where she provided everyone with a pailful of milk each night. A witch tried to get two pailsful but without success, so she returned next time with a sieve with which she milked the cow dry. After that it was never again seen at Callanish stones.”
- Janet & Colin Bord, A Guide to Ancient Sites in Britain