 Complete the following phrase:  From 23 September 122nd Siege Bty was firing to cut barbed wire for the Battle of the Canal du Nord, after which it moved up to forward positions close to the canal, where it received considerable hostile fire. Next it supported the capture of Niergnies near Cambrai on 8 October. During the Battle of the Selle on 20 October the battery was supporting the attack on the high ground east of Haussy when a single high-velocity shell killed six men instantly and wounded another 16, one of whom died. At the 