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Pinart frères (Pinart Brothers) of Marquise (Pas-de-Calais), France
1837 Pinart frères established two blast furnaces at Bouquinghen, Marquise. They used ore from Blacourt and Pessevert, used to produce iron castings for various industries.
1846 Proposal to add two new coke blast furnaces and a 60 HP blowing engine for the blast furnaces.
The above information is mainly condensed from the e-monumen.net website
Note: There was a competing ironworks nearby, founded in 1838, under the management of M. Broutta and belonging to Messrs. Sherwood ( Bailey Sherwood and Newman Sherwood), also having two blast furnaces, of the same capacity as those of Pinart. They produced pig iron for the Guines forges, operated by the same company. It appears that the Sherwoods were succeeded by James Morrison et Cie.