Hilliard felt that he had annoyed her by the persistency of his observation, and tried to keep his eyes averted.

But no; the disturbance she betrayed was due to some other cause; probably she paid not the least regard to him.
At Earl's Court she alighted hurriedly.

By this time Hilliard had begun to feel shame in the ignoble part he was playing, but choice he had none--the girl drew him irresistibly to follow and watch her.

Among the crowd entering the Exhibition he could easily keep her in sight without risk of his espial being detected.

That Eve had come to keep an appointment with some acquaintance he felt sure, and at any cost he must discover who the person was.
The event justified him with unexpected suddenness.