1 pound = 20 shillings.
1 GBP in 1843 is worth £104.72 now (https://www.bankofengland.co.uk/monetary-policy/inflation/inflation-calculator)
104.72/20*15=78.54
£78.54 = $99.55USD
99.55/40 (hrs per week) = $2.49USD per hour
Or less, given he likely worked more than 40 hours per week.
But I think we can say that $2.50/hr is a very Scrooge-like wage, and that OP has no fucking clue how to do basic math.
EDIT:
However, from https://www.measuringworth.com/calculators/ukcompare/relativevalue.php
1GBP in 1843:
in 1843 there are four choices. In 2021 the relative:
- real price of that commodity is £104.40
- labour value of that commodity is £862.70
- income value of that commodity is £1,409.00
- economic share of that commodity is £4,601.00