Of his three sons, Jabal--or "Increase"--was "the father of such as dwell in tents and of such as have cattle." He had originality enough to step beyond all traditional habits and to invent a new mode of life. Hitherto men had been tied to one spot by their fixed habitations, or found shelter when overtaken by storm in caves or trees. To Jabal the idea first occurs, I can carry my house about with me and regulate its movements and not it mine. I need not return every night this long weary way from the pastures, but may go wherever grass is green and streams run cool. He and his comrades would thus become aware of the vast resources of other lands, and would unconsciously lay the foundations both of commerce and of wars of conquest. For both in ancient and more modern times the most formidable armies have been those vast moving shepherd races bred outside the borders of civilization and flooding as with an irresistible tide the territories of more settled and less hardy tribes. Jubal again was, as his name denotes, the reputed father of all such as handle the harp and the organ, stringed and wind instruments. The stops of the reed or flute and the divisions of the string being once discovered, all else necessarily followed. The twanging of a bow-string in a musical ear was enough to give the suggestion to an observant mind; the varying notes of the birds; the winds expressing at one time unbridled fury and at another a breathing benediction, could not fail to move and stir the susceptible spirit. The spontaneous though untuned singing of children, that follows no mere melody made by another to express _his_ joy, but is the instinctive expression of their own joy, could not but give however meagrely the first rudiments of music. But here was the man who first made a piece of wood help him; who out of the commonest material of the physical world found for himself a means of expressing the most impalpable moods of his spirit. Once the idea was caught that matter inanimate as well as animate was man's servant and could do his finest work for him, Jabal and his brother Jubal would make rapid work between them. If the rude matter of the world could _sing_ for them, what might it not do for them? They would see that there was a precision in machine-work which man's hand could not rival--a regularity which no nervous throb could throw out and no feeling interrupt, and yet at the same time when they found how these rude instruments responded to every finest shade of feeling, and how all external nature seemed able to express what was in man, must it not have been the birth of poetry as well as of music? Jubal in short originates what we now compendiously describe as the Fine Arts.