The House on the Borderland - William Hope Hodgson - Bog

On the third day of their fishing holiday to the remote Irish village, two friends stumble upon the ruins of a strangely shaped house on a large lake. They discover the moldering journal of the Recluse, an unidentified man who recorded his last days in the house before its destruction. He started the diary to record the strange experiences and horrors occurring in and around the house.