Hewitt's Brothers, Grimsby

I am always interested in the brewing history of the region in which I live. The largest brewery around here must have been Hewitt Brothers in Grimsby, who at their peak supplied over 300 pubs. I'd love to get my hands on some of their brewing records and have a go at recreating one of their beers. I wonder if they used the Yorkshire square method? Wyatt was their yeast like? In the meantime, here is a photo of the brewery in it's prime.