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William Loader Allchin (1797-1876), founder of William Allchin
1797 Born in Whitechapel the son of Henry Allchin and his wife Ann Cottrell
1821 July 8th. Married in Camden to Sarah Bowyer
1823 Birth of son William Allchin
1834 Birth of son Henry Allchin
1834 Moved to Northampton
1861 Living at 21 Augustine street, Northampton: William L. Allchin (age 63 born Whitechapel), Engineer and Iron Founder employing 13 men and 8 boys. With his wife Sarah Allchin (age 64 born Wimbledon) and their daughters Rebecca Allchin (age 27 born Northampton) and Mary Ann Allchin (age 21 born Northampton).
1871 Living at 21 Augustine street, Northampton: William Loader Allchin (age 73 born Whitechapel), Engineer employing 31 men and 5 boys - Widower. With his daughter Rebecca Allchin (age 37 born Northampton). One servant. 
1875 December 30th. Died. Probate to son Henry Allchin, engineer, of 17 Waterside, Maidstone, and Samuel Gamble, Machinist, of Kingsthrope.