When they returned, the men were waiting for them. Their blue flannels were exchanged for black cloth clothes, which it had been the custom of those who called themselves gentlemen to wear in the evening. In ancient times this was their absurd custom, kept up in order to mark the difference between a gentleman and one of the lower class. If you had no dress-coat, you were not a gentleman. How could men ever tolerate, for a single day, the existence of such a social difference? As for me, in the part of London where I lived, called Whitechapel, there were no dress-coats. The change, however, seemed to have transformed them. Their faces had an eager look, as if they wanted something. Of course, in the old times everybody always wanted something. You can see it in the pictures--the faces are never at rest; in the portraits, the eyes are always seeking for something; nowhere is there visible the least sign of contentment. These unfortunate men had acquired, with their old clothes, something of the old restlessness. Christine laughed aloud and clapped her hands. The women did not laugh. They saluted the men, who bowed with a certain coldness. The manners of the Past were coming back to them swiftly, but the old ease was not recovered for the first quarter of an hour. Then Captain Heron, who had changed his uniform for civilian dress, suddenly flushed and stepped forward, whispering, "Dorothy, you have forgotten me?" Dorothy smiled softly, and gave him her hand with a quick sigh. No, she had not forgotten him. "Dance!" said Christine. "I want to see you dance. I will play for you." She played a piece of music called a Waltz. When this kind of music used to be played--I mean in the houses of (so-called) ladies, not those of the People--the young men and women caught each other round the waist and twirled round. They had many foolish customs, but none more foolish, I should suppose, than this. I have never seen the thing done, because all this foolishness was forgotten as soon as we settled down to the enjoyment of the Great Discovery. When, therefore, Christine began this music, they looked at each other for a few moments, and then, inspired by memory, they fell into each other's arms and began their dance.