"You had better leave them there in a safe place, and work from your blue-prints in the old exhibition building at the fair-grounds, being careful to lock them up in your workbench every time you depart.  I think you boys have a valuable thing here, and it is to your interest to keep others from knowing your plans or seeing the airplane until we have full government protection in the shape of patent rights.  I shall turn this set of drawings over to a patent attorney in the city and ask him to make application to the Patent Office in Washington without delay."