We need Tosh Warwick here but I think it is a very rare photo of the Linthorpe Road ground, our home for 20 years or so before Ayresome Park was built in 1903. That was the first League ground for Boro or Borough. It was roughly opposite the Swatters Carr pub. There was a fence behind the goal at the Linthorpe Road end. You went down a track (Clifton Street) to go along the side of the pitch and the main stand. A historian called Paul Stephenson, who sadly died last week once pointed out to me where the dug outs were along Clifton Street.
The main stand was moved to the new Ayresome Park and used opposite the main stand there until replaced between the wars by the South Stand that Ayresome regulars reading this would remember.