My Preciouse Cargo

I ride in the morning my cargo as preciouse as the sun I think about my cargo and where I must take it And how careful I must be on each run My cargo is rare in fact they're the only two No price could ever own them No trade would ever do And yet it is here I bring them And entrust them to your care You polish my preciouse cargo So very finely, I can barely stand the glare What is my preciouse cargo And who polishes them so well They are my darling daughters And their teachers who teach them well