Read it through once

“I sent for my wife and told her how I was situated, and asked for her help, and she thought of a thing which I might have thought of myself, if I had not been excited and worried. She said she would go and tell the visitor that I was out but would be in in a few minutes; and she would talk, and keep him busy while I got out the back way and hurried over and make Professor Lawson give the dinner. For Lawson knew everything, and could meet the guest in a creditable way and save the reputation of the University. I ran to Lawson, but was disappointed. He did not know anything about New Zealand. He said that, as far as his recollection went it was close to Australia, or Asia, or somewhere, and you go over to it on a bridge; but that was all he knew. It was too bad. Lawson was a perfect encyclopedia of abstruse learning; but now in this hour of our need, it turned out that he did not know any useful thing.