As soon as Fort Washington should be ours, the army would cross over to the island, and those of West Point arrive in the same time (which calculation may be easily done) so that we should effectually possess all the upper posts, or cut them off from their main army. Some militia would come to our assistance, and as these posts are not well furnished with provisions we should take them, at least, by famine.
The enemy's army consists of nine thousand men: they must certainly leave one thousand men in their several posts; fifteen hundred of them, at least, will be either killed at Fort Washington or blocked up at Laurel Hill, and they will then have between six and seven thousand men to attack ten. The two thousand militia (in supposing that they durst take them out) I do not mention, because we may have four thousand militia for them: under such circumstances it is, probable that Sir Henry Clinton will venture a battle. If he does, and by chance beat us, we retire under Fort Washington; but, if we beat him, his works will be at such a distance, that he will be ruined in the retreat. If, on the contrary, he knows that the French army is coming, and if we spread the report of a second division, or of Count de Guichen being upon the coasts, he will keep in his works, and we will, some way or other, carry the upper posts. When we are upon the spot we may reconnoitre New York, and see if something is to be done. If Clinton was making a forage into the Jerseys, I should be clear for pushing to the city.
If we undertake, the circumstances of the weather make it necessary that we undertake immediately. I would move the army, as soon as possible, to our position near the new bridge. This movement may invite Clinton in the Jerseys, and bring us nearer to the point of execution.
Though my private glory and yours, my dear general, both of which are very dear to my heart, are greatly interested, not so much for the opinions of America, as for those of Europe, in our doing something this campaign, I hope you know me too well to think I should insist upon steps of this nature unless I knew that they were politically necessary, and had a sufficient military probability.
I have the honour to be, &c.
The six hundred men of Luzerne's legion might be got in twelve days. If our movements had no other effect but to make a diversion in favour of the south, it would, on that footing, meet with the approbation of the world, and perhaps impeach the operations of General Leslie.
Endnote:
1. M. de Lafayette had taken, since the 7th of August, command of the corps of light infantry, consisting of six companies of men, selected in different lines of the army. Those battalions were divided into two brigades; one under the command of General Hand, the other of General Poor. The inactivity of the army was very opposite to the character and policy of M. de Lafayette; he endeavoured incessantly to find means of putting an end to it, at least as far as regarded himself. The 14th of August he had written to General Washington to ask his permission to attempt a nocturnal surprise on the two camps of Hessians established at New York Island. At the beginning of October, he attempted an expedition on Italian Island, which could not be accomplished, owing to a mistake made by the administration of the materality of the army. This letter, and the letters of the 13th of November, allude to this circumstance. We have been obliged to retrench ten letters, which relate solely to the unimportant incidents of a war of observation.