vi PREFACE 



I have only touched the fringe of the subject. An inex- 

 perienced sailor in my " piccioletta barca," I have been tossed 

 about in the breakers of this uncrossed sea. To others, better 

 equipped by knowledge arid training than I am to explore it, 



I would say 



" Metier potete ben per 1' alto sale 



vostro navigio,... 

 Quei gloriosi che passaro a Colco 

 non s' ammiraron, come voi farete, 

 quando Jason vider fatto bifolco." 



(Dante : Par. II.) 



S. G.-D. 



