assessor

n. 估计财产的人,确定税款的人

The slaves were property they　were on the tax books along with horses and cats, the valuation　of each slave written next to his name in the tax assessors books.

当时，奴隶只是一件财产，他们和马儿、猫儿一起列在税册上，在收税人的册子里，每个奴隶的名字旁边写着他们的价值。