A kenning is a compound that expresses a particular image or object through striking metaphorical constructions, usually made with two words or a phrase.
Kennings were mostly used in Old English and Old Norse literature, such as the epic poem Beowulf.
Another example is: <em>battle-sweat</em>, which means blood from combat.
The description of setting in paragraph 7 of "The Legend of Sleepy Hollow" is important to the theme of America's changing history in that it depicts Sleepy Hollow as a "drowsy" place caught in the past while great "currents" of change go on around it.