The amount of land in these sub-patents depended upon the number of shares of stock of the associates, and in effect the grants served as dividends to the shareholders. One hundred acres were granted for each share with the first division of land, and the promise was made for an equal amount upon a second division of land provided the first was "sufficiently peopled." There was to be some choice in location by the associates, although certain restrictions were imposed. No grant was to be located within five miles of the four original boroughs, and the plantation should be ten miles from other settlements unless on opposite sides of an important river. These provisions were designed to provide for expansion and at the same time avoid conflict among plantations, yet they tended to disperse the colony and complicate efforts to maintain adequate protection from the imminent threat of hostile natives. The term hundred was applied to some, but not all, of these particular plantations. The origin of this designation has sometimes been explained as a derivation from the English administrative system, but this seems valid only as it pertains to the name. There was no attempt to establish a system based on English counties and hundreds, rather the Virginia hundreds were closer to the feudal manor with a degree of economic and political independence. In the light of these conditions, Professor Wesley Frank Craven suggested the possibility that the term might have been a "colloquial designation" applied to plantations with no definite name and related to the units of 100 acres included in the grants or by the requirement to seat 100 settlers on the land. There were three general types of particular plantations. The first of these represented the voluntary pooling of land and resources by several adventurers of the company, since few had adequate land or financial support to go it alone. The company granted a patent to contiguous areas of land according to the number of shares of stock possessed by the group. Examples of this type include the Society of Smith's Hundred and Martin's Hundred. Smith's Hundred, later called Southampton Hundred, was organized in 1617 and included among its adventurers Sir Thomas Smith, Sir Edwin Sandys, and the Earl of Southampton. The grant included 80,000 acres and was located on the north side of the James River in the area between "Tanks Weyanoke" and the Chickahominy River. The society was administered by a treasurer and committees selected by a meeting of the adventurers. The associates settled at least 300 colonists within their boundaries and reported in 1635 the expenditure of L6,000 on the settlement. Martin's Hundred, organized in 1618, was named for Richard Martin and should be distinguished from (John) Martin's Brandon organized the previous year. The Society of Martin's Hundred held patent to 80,000 acres and dispatched over 250 colonists, but only a part of the tract was ever occupied.