[A] Persons unacquainted with hill scenery are apt to forget that the sky of the mountains is often close to the spectator. A black thundercloud may literally be dashing itself in his face, while the blue hills seen through its rents maybe thirty miles away. Generally speaking, we do not enough understand the nearness of many clouds, even in level countries, as compared with the land horizon. See also the close of Sec. 12 in Chap. III of this volume. TABLE OF CONTENTS. PART V. OF MOUNTAIN BEAUTY. PAGE CHAPTER I.--Of the Turnerian Picturesque. 1 " II.--Of Turnerian Topography. 16 " III.--Of Turnerian Light. 34 " IV.--Of Turnerian Mystery: First, as Essential. 56 " V.--Of Turnerian Mystery: Secondly, Wilful. 68 " VI.--The Firmament. 82 " VII.--The Dry Land. 89 " VIII.--Of the Materials of Mountains: First, Compact Crystallines. 99 " IX.--Of the Materials of Mountains: Secondly, Slaty Crystallines. 113 " X.--Of the Materials of Mountains: Thirdly, Slaty Coherents. 122 " XI.--Of the Materials of Mountains: Fourthly, Compact Coherents. 127 " XII.--Of the Sculpture of Mountains: First, the Lateral Ranges. 137 " XIII.--Of the Sculpture of Mountains: Secondly, the Central Peaks. 157 " XIV.--Resulting Forms: First, Aiguilles. 173 " XV.--Resulting Forms: Second, Crests. 195 " XVI.--Resulting Forms: Third, Precipices. 228 " XVII.--Resulting Forms: Fourthly, Banks. 262 " XVIII.--Resulting Forms: Fifthly, Stones. 301 " XIX.--The Mountain Gloom. 317 " XX.--The Mountain Glory. 344 APPENDIX. I. Modern Grotesque. 385 II. Rock Cleavage. 391 III. Logical Education. 399 LIST OF PLATES TO VOL. IV. Drawn by Engraved by Frontispiece. The Gates of the Hills _J. M. W. Turner_ J. COUSEN Plate Facing page