Old Burying Ground, Halifax Nova Scotia

I am in Halifax, Nova Scotia, and the Old Burying Ground in the middle of town has a bunch of shrouds over the grave stones. I was here last year and was told that the similar devices then were to commemorate the graves of those who died on the Titanic, but the plaque on the gates suggests that burials stopped before the Titanic sank. I will try to find out more, and post some 3D pictures tomorrow or the next day.