If my fellow-traveller had lived, he intended to have put together in book form such information as we had gathered about Southern Arabia. Now, as he died four days after our return from our last journey there, I have had to undertake the task myself. It has been very sad to me, but I have been helped by knowing that, however imperfect this book may be, what is written here will surely be a help to those who, by following in our footsteps, will be...