what were the economic circumstances of douglass's master, colonel Llyod? what conditions does he describe on the plantations? how were the slaves housed and clothed? under what conditions did they work?

One of the largest landowners and slaveowners in Maryland, Colonel Lloyd employed Douglass's first master, Captain Anthony. Douglass lived on the Great House Farm, the main plantation home of Lloyd's large landholdings. You can check more out in the following GradeSaver link:

http://www.gradesaver.com/narrative-of-the-life-of-frederick-douglass-an-american-slave-written-by-himself/study-guide/section4/