By order of the convention a memorial was sent to our fellow-citizens of each congressional district in the Commonwealth, commending to their just appreciation the conduct of Mr. Adams in defence of the right of petition, and praying them to send representatives who would be equally true, faithful, fearless in withstanding the enemies of freedom. THE ALTON TRAGEDY. Rev. Elijah P. Lovejoy was a young Presbyterian minister, a native of Maine, who soon after his graduation from college settled in the city of St. Louis, first as a school-teacher, then as a preacher, and lastly as the editor of a religious paper. In all these offices he had commended himself to the respect and affectionate regards of a large circle of friends. He conducted his paper to very general acceptance, until he became an Abolitionist. An awful, a diabolical deed perpetrated in or near St. Louis, compelled him to look after the evil influences which could have prepared any individuals to be guilty of such an atrocity, and the community in which it was done to tolerate it. Some time in the latter part of 1836, or the beginning of 1837, a slave was accused of a heinous crime (not worse, however, than many white men had been guilty of). He was tried by a Lynch Court, over which a man most appropriately named Judge Lawless presided. He was found guilty, sentenced _to be burned alive_, and actually suffered that horrid death at the hands of American citizens, some of whom were called “most respectable.” Mr. Lovejoy faithfully denounced the horrible outrage as belonging to the Dark Ages and a community of savages, and thenceforward devoted a portion of his paper to the exposure of the sinfulness and demoralizing influence of slaveholding. This was not long endured. His printing-office was broken up, his press destroyed, and he was driven out of the State of Missouri. He removed about twenty miles up the Mississippi River to Alton, Illinois, and there commenced the publication of a similar paper, called the _Alton Observer_. But though in a nominally free State, he was not beyond the power of the slaveholders. The people of that town, obsequious to the will and tainted with the spirit of their Southern and Southwestern neighbors, soon followed the example of the Missourians, demolished his printing-office and threw his press into the river. Mr. Lovejoy was a man whose determination to withstand oppression was a high moral principle rather than a resentful passion. He therefore set about, with calm resolution, to re-establish his office and his paper. In this he was encouraged and assisted by the sympathy and the contributions of some of the best people in Alton, St. Louis, and that region of country. But he had issued only one or two numbers of his _Observer_, before the ruffians again fell upon his establishment and destroyed it.