hunting, the other with exchange.

THEAETETUS: There were.

STRANGER: And of the art of exchange there are two divisions, the one of
giving, and the other of selling.

THEAETETUS: Let us assume that.

STRANGER: Next, we will suppose the art of selling to be divided into two
parts.

THEAETETUS: How?

STRANGER: There is one part which is distinguished as the sale of a man's
own productions; another, which is the exchange of the works of others.

THEAETETUS: Certainly.

STRANGER: And is not that part of exchange which takes place in the city,
being about half of the whole, termed retailing?

THEAETETUS: Yes.

STRANGER: And that which exchanges the goods of one city for those of
another by selling and buying is the exchange of the merchant?

THEAETETUS: To be sure.

STRANGER: And you are aware that this exchange of the merchant is of two