Hello Jen, Welcome to Rootschat. My Uncle was also in he First Batallion of the Northumberland Fusiliers; he was killed, I understnad, near Ypres (Leper) on 18 Jan 1915. I am sure other more knowledgeable persons on Rootschat have some better ideas, but, I am thinking since this was wintertime, perhaps the First Batallion was "hunkered down" in that area for most of the winter. I hope this helps. patrexjax