Saphroneth, do you have a link to Fox's message? Thanks23rd April:
Fox states that the Navy was never informed of the movement to the Peninsula and that it was “perfectly understood” that the Army was to move without naval support.
This is obviously and completely untrue; we have multiple messages and diary entries positively indicating that the Navy knew about the movement and that a bombardment of Yorktown was intended. Fox himself knew about it no later than the 21st of March.
Fox's 23rd April message is completely illogical and cannot possibly be true. This is not merely a matter of who you believe when two people disagree but a matter of fact; the earliest that the movement could possibly have been communicated to the Navy is the 13th of March (as it was not the plan before then) and the latest that the movement was communicated to the Navy is the 17th (because at that time Fox was already sending messages referencing it explicitly).