he came clattering up to the school door with an invitation to ichabod to attend a merry-making or `` quilting frolic , '' to be held that evening at mynheer van tassel 's ; and having delivered his message with that air of importance , and effort at fine language , which a negro is apt to display on petty embassies of the kind , he dashed over the brook , and was seen scampering away up the hollow , full of the importance and hurry of his mission .