CHAPTER I
THE INN ON THE CLIFF
According to an entry in my book of engagements, I left London for Ravensdene Court on March 8th, 1912. Until about a fortnight earlier I had never heard of the place, but there was nothing remarkable in my ignorance of it, seeing that it stands on a remote part of the Northumbrian coast, and at least three hundred miles from my usual haunts. But then, towards the end of February, I received the following letter which I may as well print in full: it serves as a fitting and an explanatory introduction to a series of adventures, so extraordinary, mysterious, and fraught with danger, that I am still wondering how I, until then a man of peaceful and even dull life, ever came safely through them.
"Ravensdene Court, near Alnwick
Northumberland
February 24, 1912
"Dear Sir,
"I am told by my friend Mr. Gervase Witherby of Monks Welborough, with whom I understand you to be well acquainted, that you are one of our leading experts in matters relating to old books, documents, and the like, and the very man to inspect, value, and generally criticize the contents of an ancient library. Accordingly, I should be very glad to secure your valuable services. I have recently entered into possession of this place, a very old manor-house on the Northumbrian coast, wherein the senior branch of my family has been settled for some four hundred years. There are here