Williamson was born about 1775. He entered the Royal Military Academy at Woolwich on 8 August 1791, and received a commission as second lieutenant in the Royal Artillery on 1 January 1794. 1794 <unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ 1799, he went to the Cape of Good Hope and served in the
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