Complex sentence: The place was of only very minor economic importance at the time of the Norman Conquest; a reference to it in the Domesday Book survey of 1086 given as "Legra", a Norman-French literation of an Old English word meaning meadow or clearing.
Split into simpler sentences: The place was of only very minor economic importance at the time of the Norman Conquest; a cursory reference to it is given in the Domesday Book survey of 1086, noted as "Legra". This is a Norman-French literation of an Old English word meaning meadow or clearing.