From what we see and know of the operations of the rebels in this part of the South (the Southern coast, where he has been stationed), and from what we see perfidious Englishmen doing for the rebels, we are fast becoming strong abolitionists. We feel that _now_ Slavery must receive its death-blow, and be destroyed forever from the country. You would be surprised to see the change going on in the minds of officers in our service, who have been great haters of abolitionists; and the Southerners in our navy are the most bitter toward those who have made slavery the great cause of war. They freely express the opinion that the whole system must be abolished, and even our old captain, who is a native of Tennessee, and who has hitherto insisted that the abolitionists of the North brought on this war, said last night, 'If England continues to countenance the _institution_, I hope our government will put arms in the hands of the slaves, and that slavery will now be the destruction of the whole South, or of the rebels in the South.' He further said, 'The slave-holder has, by the tacit consent and aid of England, brought on the most unjustifiable, iniquitous and barbarous war ever known in the history of the world.' Too far and too fast--it is not Abolition, or the good of the black, but Emancipation, or the benefit of the _white_ man, which is really progressing so rapidly with the American people. But whatever causes of agitation are at work, whether on limited or general principles of philanthropy and political economy, one thing is at least certain--the day of the triumph of free labor is dawning, while the cause of progress 'Careers with thunder speed along!' * * * * * It is almost a wonder that the late offer of the king of Siam to stock this land with elephants was not jumped at, when one remembers the American national fondness for the animal, and how copiously our popular orators and poets allude to a sight of the monster. Among the latest elephantine tales which we have encountered is the following, from our New Haven correspondent:--