"We passed out of the back door of the dwelling house and entered a spacious yard nearly surrounded with neatly whitewashed two story buildings, devoted to the use of the slaves. Turning to the left we came to a strong grated door of iron opening into a spacious yard surrounded by a high whitewashed wall, one side of this yard was roofed, but the principal part was open to the air. Along the covered side extended a table, at which the slaves had recently taken their dinner, which, judging from what remained, had been wholesome and abundant.... The gate was secured by strong padlocks and bolts."[258]

Such was the slave prison of one of the largest and most prosperous slave-dealing firms.

There were many dealers who had no place of their own in which to keep slaves, but were dependent upon the "prisons" of others.[259] Indeed, at Washington, the city public prison was often used by negro traders as a place of safety for their slaves. The keeper was paid by the traders for the privilege.[260] This practice continued a great number of years. In 1843 the poet Whittier thus describes the prison:

"It is a damp, dark and loathsome building. We passed between two ranges of small stone cells filled with blacks. We noticed five or six in a single cell which seemed scarcely large enough for a solitary tenant. The heat was suffocating. In rainy weather the keeper told us that the prison was uncomfortably wet. In winter there could be no fire in these cells. The keeper with some reluctance admitted that he received negroes from the traders and kept them until they were sold, at thirty-four cents per day."[261]

While, no doubt, some traders kept their "prisons" in as good condition[262] as circumstances would allow, there were others, and probably the majority, who did not. A Northern minister describes those at Richmond in 1845, as "mostly filthy and loathsome places."[263]

In the buying States two of the principal slave markets were Natchez and New Orleans.[264] That of Natchez is thus described about 1835 by Ingraham:

"A mile from Natchez we come to a cluster of rough wooden buildings, in the angle of two roads in front of which several saddle horses, either tied or held by servants, indicated a place of popular resort.... We entered through a wide gate into a narrow court yard. A line of negroes extended in a semicircle around the right side of the yard. There were in all about forty. Each was dressed in the usual uniform when in market consisting of a fashionably shaped black fur hat, ... trousers of coarse corduroy velvet, good vests, strong shoes, and white cotton shirts."[265] ...

"There are four or five markets in the vicinity of Natchez. Several hundred slaves of all ages are exposed to sale.... Two extensive markets for slaves opposite each other, on the road to Washington three miles from Natchez."[266]

A slave market in New Orleans was described in 1844 as a large and splendidly decorated edifice, which had the appearance of having been fitted up as a place of recreation. It had a number of apartments, a handsome archway, and a large green lawn or outer court "beautifully decorated with trees." In this lawn the sale of slaves was held.[267]

When a trader in the selling States had collected enough for a shipment or "coffle" they were sent to the markets in the buying States.[268] Slaves were sent South both by land and water.[269] In the winter they were usually sent by water, but in summer they were often sent by land.[270]