The beliefs were from the Westminster Confession of Faith. It is basically a Presbyterian summary of what scripture teaches.
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The Westminster Confession of Faith - This confession was produced by the Westminster Assembly of Divines, which had been created by the English Parliament in 1643 to settle various theological and ecclesiastical issues in the British Isles. It was presented to Parliament in 1646 and with scripture proofs in 1647. It was essentially an English Puritan document that didn't take hold in England but was embraced enthusiastically in Presbyterian Scotland and so later the English-speaking Presbyterian world as well. It covers the spectrum of theological topics and is similar to the Belgic Confession.
