dilate upon

I might here—if it so pleased me—dilate upon the matter of habiliment, and other mere circumstances of the external metaphysician.

I shall not for the moment dilate upon this point, because we shall have occasion to return to it.

As a rule, their pay is very small compared with what is given to English Clerks, for reasons which I need not dilate upon here.

But I would write too long a letter if I dilate upon the French masterpieces.

As it would be futile to dilate upon what this overwhelming sum means to British industries, it must be left to the imagination.