The oak described in this paper is believed by the author to have fallen into a small isolated lake, which had been subsequently filled up by the growth of aquatic plants, so as to form a peat-moss, in which the upper part of the tree has been completely preserved, with its bark entire. The tree had grown 500 feet above the level of the sea. The trunk was feet long, without any appearance of root. As it must therefore have been actually even longer, and the remains of other oaks were found near, it must have grown in a wood, probably forming a part of that division of the Caledonian forest, which, previous to the 14th century, covered Avondale and the upper part of Ayrshire. It must have contained; 534 feet of measurable timber. The author conjectures, that the destruction of the forest commenced during the wars of the succession about the year 1300, and the contests between Edward I. and II. and Baliol and Bruce; for a number of silver pennies of the two Edwards had been found in the neighbourhood, but no coins of a laterdate. It is probable that these had been deposited by English soldiers soon before the battle of Bannockburn in 1314.