A pen and ink, wash and watercolour drawing of the Mary Tudor Tower or Governor's Tower in the Lower Ward of Windsor Castle, seen from Castle Hill. With oil stains. On a later mount inscribed in pencil: Windsor 1782. The Governor's Tower, Lower Ward.

The Mary Tudor Tower and adjoining houses were built in the fourteenth century as the belfry for St George's Chapel and accommodation for the choristers. The houses were converted into accommodation for the Military Knights in the sixteenth century. The central tower (now the Mary Tudor Tower) became the home of the Governor of the Knights. Sandby made many drawings of Windsor Castle. This simple study of the Tower can be compared to RCIN 917759, a view from further up the Lower Ward. A finished watercolour view of the Mary Tudor Tower from St George's Chapel is RCIN 914552. Sandby also made an etching of this subject.