sentences:  Telford advised against this, but there were persistent problems with the water dislodging the clay, and eventually, some of the canal was lined with stone, placed on top of the puddle clay.Water still seeped up between the stones, but did not bring the underlying sand with it, and so the canal remained watertight.The Macclesfield Canal opened throughout on 9 November 1831, and the Hall Green Branch was used from that date.