"A necessary consequence from this, by a process simply of interpretation, must be that if, for any reason, [the purpose could not be carried out,] the money was to be returned to [the lender]: the word 'only' or 'exclusively' can have no other meaning or effect."
"It is very well known law that if one person makes a payment to another for a certain purpose, and that person takes the money knowing that it is for that purpose, he must apply it to the purpose for which it was given. He may decline to take it if he likes; but if he chooses to accept the money tendered for a particular purpose, it is his duty, and there is a legal obligation on him, to apply it for that purpose."