On Saturday morning last the quiet little village of Cardiff, which lies in the valley about twelve miles south of Syracuse, was thrown into an excitement without precedent, by the report that a human body had been exhumed in a petrified state, the colossal dimensions of which had never been the fortune of the inhabitants of the little village to behold, and the magnitude of which was positively beyond the comprehension or the understanding of the wise men of the valley. We are told that there were giants on the earth once; and, if the reports of those who have investigated this discovery are true, and that they are we have no doubt, this stony man--who for hundreds of years may have slept untouched and undisturbed, had it not been for the rude hand of a Cardiff farmer--must have been one of them. The excitement in and around Cardiff extended until it reached the City of Salt, and all day yesterday the discovery was the chief topic of conversation at the hotels and public places in the city. Of course, the most extravagant stories were told, and greedily devoured up by gaping listeners. Some would have it that the body exhumed was twenty-five feet high, and proportionately large. All day yesterday crowds visited the scene of the discovery, and returned to tell the tale of the wonderful discovery to their eager friends. From the Standard, October 23d. LETTER FROM REV. MR. CALTHROP. DEAR SIR--As everyone is deeply interested in the Onondaga Giant, perhaps it may be as well for each of us to add his mite towards guessing at the solution of the problem he has silently set us all. It is no wonder that so many are of opinion that he is a gigantic petrifaction. His proportions are so perfect, and his appearance is so life like. I will add, that every one wants to think so. If he proved to be a petrifaction, what a realm of awe and mysterious conjecture would he open to us. But I, for one, feel convinced that he will prove to be statue, and for these reasons:--