| Although in form very primitive, silent barter is in substance more advanced than the exchange of presents, for it is based on the strict principle of give-and-take resulting from hard bargaining. |
| At the place it was intended for all along, paid in by silent barter, which without detailed operational intelligence we cannot hope to trace. |
| Perhaps one might even say that the development of universal rules of conduct did not begin within the organized community of the tribe but rather with the first instance of silent barter. |
| It is reported that formerly, exchange was carried on by means of silent barter. |
| The Torres Straits method of using silent barter after war and the method of silent barter formerly found in the Admiralties are another means of making trade possible in spite of hostility. |
| But a long period of piracy intervened between the early practices of silent barter and the later trade by modern exchange methods. |
