been built having been taken down, the present makeshift gable was put up instead to fill up the gap, which, in these circumstances, would be left for the supposed opening into the church."[293] On the north side of the nave there is a large porch called Halkerston's Tower. It was a two-storied building, the upper storey being of great height and vaulted as well as the lower one. The erection of the west end of the church is referable to about 1489,[294] when payments were made "to the kirk werk of Pertht." The central tower was erected after the adjoining part of the nave, and has one window in each face. The parapet and corbelling were renewed about forty years ago.[295] The exterior of the church has been altered at various times, and an open parapet carried along the top of the choir wall over the clerestory windows as well as along the aisle walls and up the sloping gables of the east end. Dormer windows to light the galleries break in on this aisle-wall parapet, as well as on the roof of the nave. It was in the Church of St. John, Perth, that John Knox denounced the Mass in 1559, and the multitude afterwards demolished the ornaments, images, and altarpieces as well as the monasteries and religious houses in Perth--an example quickly followed by others throughout the country. In Scott's novel, _The Fair Maid of Perth_, the church is the scene of the trial by bier-right to discover the slayer of Proudfute. The East Church (or choir) has been recently restored, and many look forward to the day when, the present partition walls being removed, St. John's Church will once more reveal the full splendour of its striking and grand interior. Perth awaits a generous restorer, and St. John's affords a grand opportunity for patriotism and beneficence. DUNDEE CHURCH TOWER