eight o'clock
`` Better go for 'd , '' he ordered , `` an ' help The Squarehead on the lookout . At eight o'clock we ought to be right under the lee o ' Point San Pedro ; when I whistle we ought to catch the echo thrown back by the cliff . Listen for it . '' Promptly at eight o'clock , Mr. McGuffey was horrified to see his steam gauge drop half a pound as the _ Maggie 's _ siren sounded . Mr. Gibney stuck his ingenious head out of the pilot house and listened , but no answering echo reached his ears . `` Hear anything ? '' he bawled .