It is a thought-provoking thing, this passing from one great garrison to another all the way down the frontier. I had started from the busy order of Toul; I had passed through the silence and peace of all that Moselle country, the valley like a long garden, and I had come to the guns and the tramp of Epinal. I had left Epinal and counted the miles and miles of silence in the forests, I had crossed the great hills and come down into quite another plain draining to another sea, and I heard again all the clamour that goes with soldiery, and looking backward then over my four days, one felt--one almost saw--the new system of fortification, the vast entrenched camps each holding an army, the ungarnished gaps between. As I came nearer to Belfort, I saw the guns going at a trot down a side road, and, a little later, I saw marching on my right, a long way off, the irregular column, the dust and the invincible gaiety of the French line. The sun here and there glinted on the ends of rifle-barrels and the polished pouches. Their heavy pack made their tramp loud and thudding. They were singing a song. I had already passed the outer forts; I had noted a work close to the road; I had gone on a mile or so and had entered the long and ugly suburb where the tramway lines began, when, on one of the ramshackle houses of that burning, paved, and noisy endless street, I saw written up the words, Wine; shut or open. As it is a great rule to examine every new thing, and to suck honey out of every flower, I did not--as some would--think the phrase odd and pass on. I stood stock-still gazing at the house and imagining a hundred explanations. I had never in my life heard wine divided into shut and open wine. I determined to acquire yet one more great experience, and going in I found a great number of tin cans, such as the French carry up water in, without covers, tapering to the top, and standing about three feet high; on these were pasted large printed labels, '30', '40', and '50', and they were brimming with wine. I spoke to the woman, and pointing at the tin cans, said-- 'Is this what you call open wine?' 'Why, yes,' said she. 'Cannot you see for yourself that it is open?' That was true enough, and it explained a great deal. But it did not explain how--seeing that if you leave a bottle of wine uncorked for ten minutes you spoil it--you can keep gallons of it in a great wide can, for all the world like so much milk, milked from the Panthers of the God. I determined to test the prodigy yet further, and choosing the middle price, at fourpence a quart, I said-- 'Pray give me a hap'orth in a mug.' This the woman at once did, and when I came to drink it, it was delicious. Sweet, cool, strong, lifting the heart, satisfying, and full of all those things wine-merchants talk of, bouquet, and body, and flavour. It was what I have heard called a very pretty wine.