But the decay of the ancient custom of sending Valentines has probably not come about from within itself; it may rather be attributed to the progress made in what may be called the rival custom of sending cards of greeting and good wishes at Christmas-time. It would almost seem that two such customs, having their times of observance only a few weeks apart, cannot exist together; and it will probably be found that the new has been growing precisely as the old has been dying, the former being much the stronger, choking the latter. Valentines were sent by the young only--or for the most part, at any rate--while Christmas-cards are in favour with almost every age and condition of life. It follows, then, that a custom such as this, having developed great energy, and being patronised by all classes, must throw a larger mass of work upon the Post-office--the channel through which such things naturally flow--than Valentines did. And so it has been found. The pressure on the Post-office in the heyday of Valentines was small by comparison with that which is now experienced at Christmas. During the Christmas season of 1877, the number of letters, &c., which passed through the Inland Branch of the General Post-office in London, in excess of the ordinary correspondence, was estimated at 4,500,000, a large portion of which reached the chief office on Christmas morning; while in the Christmas week of 1882 the extra correspondence similarly dealt with was estimated at 14,000,000, including registered letters (presumably containing presents of value), of which there was a weight of no less than three tons. Everywhere similar pressure has been felt in the post-offices, and it is by no means settled that we have yet reached the climax of this social but rampant custom. In the London Metropolitan district there are employed 4030 postmen; and taking their daily amount of walking at 12 miles on the average--a very low estimate--this would represent an aggregate daily journeying on foot of 48,360 miles, or equal to twice the circumference of our globe.