No flowers, no garlands gay? All blasted?
All wasted?
Not so, my heart; but there is fruit,
And thou hast hands.
(George Herbert, "The Collar")

i think that it is letter d.

in our power to make a world happy - to teach mankind the art of being so - to a character hitherto unknown - and to have, as it were, a new creation intrusted to our hands, are honors that command reflection, and can neither be too highly estimated,

i would need to know the specific part of the passage your referring to ?