He may have carried an electric torch.

Let's try and reconstruct the affair.

We'll suppose that the murderer, whoever he was, was so anxious to find some paper that he wanted, and that he believed Kitely to have on him, that he immediately examined the contents of the pocket-book.

He turned on his electric torch and took all the papers out of the pocket-book, laying the pocket-book aside.

He was looking through the papers when he heard a sound in the neighbouring coppices or bushes.