As to the Delhi affair, [i. e., the Indian Rebellion of 1857] it seems to me that the English ought to begin their retreat as soon as the rainy season has set in in real earnest. Being obliged for the present to hold the fort for you as the Tribune's military correspondent I have taken it upon myself to put this forward. NB [nota bene; "take note"], on the supposition that the reports to date have been true. It's possible that I shall make an ass of myself. But in that case one can always get out of it with a little dialectic. I have, of course, so worded my proposition as to be right either way.

Letter to Friedrich Engels, dated 15 August 1857.