This quote from Anderson might give you an answer:
I confess that it surprises me greatly (that these orders) contradict the assurances of Mr. Crawford that Fort Sumter would be evacuated. I trust that this matter will be at once put in a correct light, as a movement made now, when the South has been erroneously informed that none such will be attempted, would produce most disastrous results throughout our country.
It is, of course, now too late for me to give any advice in reference to the proposed scheme of Captain Fox. I fear that its result cannot fail to be disastrous to all concerned Colonel Lamons remark convinced me that the idea (of re-supply), merely hinted at to me by Captain Fox, would not be carried out.
We shall strive to do our duty, though I frankly say that my heart is not in the war which I see is to be thus commenced.
Major Anderson, Ft. Sumter, Charleston Harbor, Six days before the invasion.
"It became clear that slavery was tolerable. Failure to collect revenues was not."