My dear son Horatio,
Be assured that despite the appearance of things, I am still of sound mind and judgment. By the time you read this, I shall be dead. Unless someone has been very careless, you doubtless think of my death as an accident. I assure you it was nothing of the sort. Do not waste your time going to the police, however, as those responsible are sure to have covered their tracks well. Instead, please carry out the following instructions to the letter. In this, do not fail me. Rest assured that this is of vital importance to London, the British Empire, and quite possibly the world.
1) Mr Oldacre will doubtless have come by the house a few days ago, asking for a book I have in my collection, the Oedipus Ægyptiancus by Athanasius Kircher. I hope and pray you have given it to him.
2) Go with all speed to Truro, in Cornwall, and you are to book yourself into the Black Lion Hotel. Do not use your real name. They will be expecting you. Rise very early in the morning, before 5am, and open the package marked 'For Use'. It contains a candle and a piece of paper. Light the candle and whisper aloud the verses on the paper three times. Then leave at once. Do not extinguish the candle.
3) Upon this being done, go to London and deliver the letter to Mr Oldacre.
Please do all these things as quickly as possible, and further please take great care for your safety as there are many who would wish you ill. I would not advise staying in this house, but putting it up for sale. Oh, that I knew what Oldacre and myself had become involved with in our youth! Perhaps then you could be spared these tasks -- but I implore once again, that you do not fail me at the last, for all our sakes.
--Your father,
ELIAS CARTWRIGHT.