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of Upper Allen Street, Sheffield
1819 Company established - Blake, Garnett and Co
1859 Partnership change. '...the Partnership heretofore subsisting between the undersigned, John Stephenson, Thomas Blake, William Thompson, Henry Bannister Smith, and Henry Stephenson, all of Sheffield, in the county of York, carrying on business as Type Founders, under the style or firm of Stephenson, Blake, and Co., has this day been dissolved by effluxion of time; and that the business of the said firm will henceforth he carried on by the said Henry Stephenson, Thomas Blake, William Thompson, and John Stephenson, under the style or firm aforesaid...'
1879 Partnership change. '...the Partnership lately subsisting between the undersigned, Henry Stephenson and William Greaves Blake, and the undersigned executors (i.e. Anne Thompson, Wm. Johnson, Fredk. Hall) of William Thompson, deceased, as Type Founders, at Sheffield, in the county of York, under the style or firm of Stephenson, Blake, and Co., has this day become dissolved by effluxion of time; and notice is hereby further given, that the said business will in future be carried on and conducted by the undersigned, Henry Stephenson and William Greaves Blake, under the said style or firm of Stephenson, Blake, and Co...'
1892 Legal petition. Mentions '...Sir Henry Stephenson, William Greaves Blake, and Harry Kenyon Stephenson, trading as Stephenson, Blake, and Co., of Sheffield, in the county of York, Type Founders...'
1904 Two of the principals, Sir Henry Stephenson and Major William Blake, died with a few weeks of each other
1905 Merger with Sir Charles Reed and Sons as Stephenson, Blake and Co and Sir Charles Reed and Sons
1914 Name changed to Stephenson, Blake and Co
1914 Letter founders, wood letter cutters and manufactures of brass rule and printing materials. Specialities: metal type, printers' joinery, wood type, brass rule and everything required for letterpress printing. 
1914 One of the Associated Type Founders which participated in the 5th International Exhibition of the Printing and Allied Trades at the Agricultural Hall, Islington
2000 Stephenson Blake (Holdings) was wound up voluntarily; C. L. Stephenson was chairman of the meeting