What was Sir William Arthur Lewis’s first job and how much did he get paid?

Question: What was Sir William Arthur Lewis's first job and how much did he get paid?
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Asked by anon-1631 to Sir William Arthur Lewis on 5 Oct 2022.
- Sir William Arthur Lewis answered on 5 Oct 2022:
  
  He worked as a government clerk when he was a teenager and would have been paid more than agricultural workers and other manual labour, but less than white people and those with more responsibility. I don’t know exact numbers.

Question: What was Sir William Arthur Lewis's first job and how much did he get paid?