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1885 After the dissolution of the Partnership W. and A. M'Onie, Engineers and Millwrights, in Glasgow, the business in all its branches was carried on under the firm of W. and W. M'Onie, by William M'Onie, jun.
1887 William McOnie, Junior died; his son (William McOnie (1877-1905)) was presumably left a large interest in the business but was too young to take over straight away.
1905 After the death of William McOnie, the firm became the Harvey Engineering Co., Glasgow.