But the rebels were not relying wholly on measures for reducing Sumter in order to secure it. It was diplomacy rather than war which they expected would place in their hands all the government property in Charleston Harbor. On the very day of Anderson's strategic move across the harbor, three commissioners arrived in Washington for the purpose of negotiating for the peaceable surrender to South Carolina of all the forts and establishments. But the telegraphic news, which reached Washington with the commissioners, that the loyal Anderson was doing his part, met with such patriotic response in the North as effectively to interfere with the commissioners' plans. What Buchanan might have released to them under other circumstances, he could not give them after Major Anderson had taken steps to protect his trust. Once within the fort, the Sumter garrison set vigorously to work to put it in a defensive condition. The Government work on the fort was not completed, and had the Southerners attacked it at once, as they would have done but for the expectation that the President would order Anderson to return to Moultrie, they could easily have captured it by assault. But they still hoped for "bloodless secession," and deferred offensive action. There were no flanking defences for the fort, and no fire-proof quarters for the officers. There was a great quantity of combustible material in the wooden quarters, which ultimately terminated the defence; for the garrison was rather smoked out by fire, than either starved out or reduced by shot and shell. The engineer officers were driven to all sorts of expedients to make the fort tenable, because there was very little material there out of which to make proper military defences. The workmen had left in the interior of the unfinished fort a confused mass of building material, unmounted guns, gun-carriages, derricks, blocks and tackle. Only two tiers of the fort were in condition for the mounting of heavy artillery--the upper and lower tiers. Although the garrison was severely taxed in performing the excessive guard duty required by their perilous situation, they yet accomplished an enormous amount of work--mounting guns with improvised tackle; carrying by hand to the upper tier shot weighing nearly one hundred and thirty pounds each; protecting the casemates with flag-stones; rigging ten-inch columbiads as mortars in the parade grounds within the fort, to fire on Morris Island; and making their quarters as comfortable as the circumstances admitted. The guns of the fort were carefully aimed at the various objects to be fired at, and the proper elevation marked on each, to avoid errors in aiming when the smoke of action should refract the light.