Photograph showing a broadside view the Queensferry cantilever of the Forth Bridge in an advanced stage of construction.

Photograph showing the interior of the Forth Bridge engineers' drawing loft at South Queensferry.

Photograph of the Fife S Cantilever of the Forth Railway Bridge under construction reaching over the Forth to the north shore covered on steam cranes and hoists.

Photograph of a skewback joint on the Queensberry cantilever of the Forth Bridge looking along one of the base 12ft horizontal tubes of the central column, showing the considerable support scaffolding.

Photograph of the Queensferry cantilever in an early stage of construction taken from the south shore, with the piles of plates and other materials in the foreground waiting to be used.

Photograph of the Queensferry cantilever in an early stage of construction taken from the south shore, with the piles of plates and other materials in the foreground waiting to be used.

Photograph of the junction at end of bottom member, bay 1, Queensferry cantilever, north east corner, showing workmen pushing box girder from the temporary platform above to line up with the huge skewback joint tube below.

Photograph of a distant view of the Forth Bridge under construction taken from the South Shore showing the central columns slowly rising up and the south approach viaduct.

Damaged photograph of the main support pier of the Queensferry cantilever showing the bridge building materials stockpiled including the curved plates used on the 12ft tubes.