Conservation departments

Detail of the x-ray of the left background and the equivalent area of the finished painting
The x-ray also shows that the to the left of the Viscountess there was originally a twisted, columnar form with a linear highlight weaving across its surface and a clump of circular shapes gathered at its base. Comparison with Gainsborough’s other portraits of the period suggest this was almost certainly a tree trunk with a climbing vine or ivy adding a decorative feature to the surface and blooms or foliage at the foot of the tree.