Children performed all sorts of jobs including working on machines in factories, selling newspapers on street corners, breaking up coal at the coal mines, and as chimney sweeps. Sometimes children were preferred to adults because they were small and could easily fit between machines and into small spaces.
source: https://www.ducksters.com/history/us_1800s/child_labor_industrial_revolution.php
Answer:
Dysentery, Scurvy from the trip and food in general. It's why the Galapagos became a pit stop for awhile and they'd roll Tortoises onto the ship as rations later, It apparently tasted good but being a time where everyone was malnourished, the bar was pretty low. Giant tortoise was a part of sea fare. and now their endangered.
Explanation:
An eight hour day, an end to child labor and work