sentences:  On the slopes of Craignaught Hill was fought a singularly unusual battle between the Boyds of Kilmarnock and the Stewarts of Darnley.Sir Alan Stewart had been treacherously slain by Sir Thomas Boyd, and his son, Alexander Stewart, was determined to take revenge.Sir Thomas was surprised on the night of 9 July 1439, whilst riding past Craignaught on his way north and although outnumbered, he and his followers fought on, even taking agreed rest periods indicated by the sounding of a horn.