OCT. 18.--It is a day to make one in love with life. The remains of the long storm, before which we have been driven for a week, lie, in white, turreted masses around the horizon, the sky overhead is spotlessly blue, the sun is warm, the wind steady and fresh, but soft as a child's breath, and the sea--I must sketch it to you more elaborately. We are in the Gulf Stream. The water here as you know, even to the cold banks of Newfoundland, is always blood warm, and the temperature of the air mild at all seasons, and, just now, like a south wind on land in June. Hundreds of sea birds are sailing around us--the spongy sea-weeds, washed from the West Indian rocks, a thousand miles away in the southern latitudes, float by in large masses--the sailors, barefoot and bareheaded, are scattered over the rigging, doing "fair-weather work"--and just in the edge of the horizon, hidden by every swell, stand two vessels with all sail spread, making, with the first fair wind they have had for many days, for America. This is the first day that I have been able to be long enough on deck to study the sea. Even were it not, however, there has been a constant and chilly rain which would have prevented me from enjoying its grandeur, so that I am reconciled to my unusually severe sickness. I came on deck this morning and looked around, and for an hour or two I could scarce realize that it was not a dream. Much as I had watched the sea from our bold promontory at Nahant, and well as I thought I knew its character in storms and calms, the scene which was before me surprized and bewildered me utterly. At the first glance, we were just in the gorge of the sea; and, looking over the leeward quarter, I saw, stretching up from the keel, what I can only describe as a hill of dazzling blue, thirty or forty feet in real altitude, but sloped so far away that the white crest seemed to me a cloud, and the space between a sky of the most wonderful beauty and brightness. A moment more, and the crest burst over with a splendid volume of foam; the sun struck through the thinner part of the swell in a line of vivid emerald, and the whole mass swept under us, the brig rising and riding on the summit with the buoyancy and grace of a bird.