Whatever the motive for their coming, however, they managed to get across the sea. The immigrants set to work with a will. They cut down forests, built houses, and laid out fields. They founded churches, schools, and colleges. They set up forges and workshops. They spun and wove. They fashioned ships and sailed the seas. They bartered and traded. Here and there on favorable harbors they established centers of commerce--Boston, Providence, New York, Philadelphia, Baltimore, and Charleston. As soon as a firm foothold was secured on the shore line they pressed westward until, by the close of the colonial period, they were already on the crest of the Alleghanies. Though they were widely scattered along a thousand miles of seacoast, the colonists were united in spirit by many common ties. The major portion of them were Protestants. The language, the law, and the literature of England furnished the basis of national unity. Most of the colonists were engaged in the same hard task; that of conquering a wilderness. To ties of kinship and language were added ties created by necessity. They had to unite in defense; first, against the Indians and later against the French. They were all subjects of the same sovereign--the king of England. The English Parliament made laws for them and the English government supervised their local affairs, their trade, and their manufactures. Common forces assailed them. Common grievances vexed them. Common hopes inspired them. Many of the things which tended to unite them likewise tended to throw them into opposition to the British Crown and Parliament. Most of them were freeholders; that is, farmers who owned their own land and tilled it with their own hands. A free soil nourished the spirit of freedom. The majority of them were Dissenters, critics, not friends, of the Church of England, that stanch defender of the British monarchy. Each colony in time developed its own legislature elected by the voters; it grew accustomed to making laws and laying taxes for itself. Here was a people learning self-reliance and self-government. The attempts to strengthen the Church of England in America and the transformation of colonies into royal provinces only fanned the spirit of independence which they were designed to quench.