wailer
A boy employed to pick out stones, pyrites, etc. remaining in the coal after it is screened.
wailer: the child who sorted coal by hand
A wailer was a child, typically between six and fourteen years old, stationed at a coal picking table after screening to remove remaining stone, pyrites, and other waste from the coal. The term originated in British collieries and was particularly common in the nineteenth and early twentieth centuries. The child would sit at a chute or table receiving coal that had already passed through mechanical screens, then manually separate unsuitable material by hand or with a small hammer.
The work required speed and practiced judgment. A wailer needed to recognize pyrites (iron sulphide, which burns poorly and damages boilers), shale, mudstone, slate, and other minerals mixed with coal. These materials reduced fuel quality and increased ash content, which was costly to handle downstream. The child would throw clean coal into one bin and waste into another, working continuously as coal moved across the table.
The etymology is debated but most likely derives from the Scots word for wail or weal, meaning to pick or choose, reflecting the selection process itself. Some sources suggest it comes from 'waul', meaning to cry, though this may be folk etymology rather than fact. Regional variants included 'pit screener', 'tripper', or simply 'picker', with terminology varying between British coalfields.
The role was almost entirely performed by children because wages could be kept minimal and young fingers were considered nimble enough for the repetitive task. Wailers typically earned between two and five shillings per week depending on region and period. The position was vulnerable to injury from machinery and long-term respiratory exposure, and was progressively replaced by mechanical picking tables and gravity separation devices from the 1920s onward.
By the mid-twentieth century, the wailer had largely disappeared from collieries as automated coal preparation became standard. The term now appears mainly in historical accounts and heritage mining sites. It represents a specific point in industrial practice when unskilled child labor was considered an acceptable means of improving raw material quality in primary extraction.