It's excitement.

If you look into the depths of my wonderful eyes--I have got wonderful eyes, haven't I ?" "Marvellous." "You will see that I am suffering from suppressed excitement.

To-night is quite an epoch.

To tell you the truth, I am rather nervous about it." "Is he here ?" "You shall see him presently," she promised.

"Come along." "Where is Susan ?" he asked, as he followed her.
"Gone out.