210 BIOLOGICAL PROBLEMS 



No trouble can be too great, no care too skilful, no 

 research too laborious in the endeavour to preserve 

 and defend these youthful knights of the air, who, in 

 defence of home and country, with gladsome and 

 buoyant heart, on their new-found steed, soar daily 

 forth "per ardua ad astra". 



M. F. 



