When John Mason had left us, Holmes set to work making a very careful examination of the graves, ranging from a very ancient one, which appeared to be Saxon, in the centre, through a long line of Norman Hugos and Odos, until we reached the Sir William and Sir Denis Falder of the eighteenth century. It was an hour or more before Holmes came to a leaden coffin standing on end before the entrance to the vault. I heard his little cry of satisfaction and was aware from his hurried but purposeful movements that he had reached a goal. With his lens he was eagerly examining the edges of the heavy lid. Then he drew from his pocket a short jemmy, a box-opener, which he thrust into a chink, levering back the whole front, which seemed to be secured by only a couple of clamps. There was a rending, tearing sound as it gave way, but it had hardly hinged back and partly revealed the contents before we had an unforeseen interruption.