Tuson's Yard would have been a cluster of cottages that had been built in the yard behind a building on the street frontage. There were many such yards in Newbury and they varied from slum accommodation to a few quite nice properties - but the former was more common. In the early 20th century they were seen to be a problem, council house building began and the cottages were largely demolished over the years - especially since WWII as the sites were redeveloped.
A big problem is that the names of the yards changed as the owners or occupiers of the street frontage changed - they had no official names until the 1870s. It would be unusual for a yard to be named after the occupants, but I can't say it is impossible. In 1878 the Borough Council were asked for names to be put on to the first official detailed map which was being surveyed by the Ordnance Survey.
In 1878 there were six yards off St Mary's Hill: Bradley's Yard, Garland's Yard, Pigeon's Yard, Brixton Yard, Miller's Yard & Turk's Yard. Any of these could have been Tuson's Yard in 1848, but I suspect none of them were.
To complicate things further, the point at which St Mary's Hill starts and Cheap Street begins is not static.
The Tuson I most associate with the area is Charles, landlord of the Coach & Horses - usually referred to as Cheap St, but sometimes as St Mary's Hill. Sadly this pub was demolished before 1878, but there was a Coach & Horses Yard, which was absorbed into a new Market Street in 1872. This would seem to be the most obvious 'Tuson's Yard', though Tuson was not yet at the pub when the 1848 County Directory was compiled and I can't prove he was there until 1851. Nevertheless a Tuson family, which includes Charles and his brother Henry, were in the approximate area in 1841.
