The Stone Raft by José Saramago

The first crack appeared in a large slab of natural stone, as smooth as the table of the winds, somewhere in these mountains of Alberes, which, at the eastern end of the Pyrenees, slope gently down to the sea and where the ill-starred dogs of Cerbère now rove, an allusion that is not inappropriate in time or place, for all these things, despite their appearances, are interconnected. Excluded, as has been stated, from any domestic sustenance, and consequently forced by necessity to recall in his unconscious memory the skills of his predatory ancestors in order to catch some stray rabbit, one of those dogs, Ardent by name and endowed with the acute hearing characteristic of the species, must have heard the stone cracking, for, although incapable of sniffing, the dog approached the stone, dilating his nostrils, his hairs bristling as much from curiosity as from fear.

The crack, ever so fine, would remind any human observer of a line drawn with the sharpened point of a pencil, altogether different from that other line made with a branch on hard soil or in the loose, soft dust, or in the mud, should we choose to waste our time on such daydreams. But as the dog was approaching, the crack grew bigger, grew deeper and began to spread, splitting the stone up to the edges of the slab, and then all the way across, there was room to put a hand inside, a whole arm in width and length, had there been any man around with enough courage to cope with this phenomenon. The dog Ardent prowled around, agitated, yet unable to escape, attracted by the snake of which neither the head nor the tail could be seen, and suddenly he was lost, not knowing on which side to stay, whether in France, where he now found himself, or in Spain, no more than three spans away.