Report on the excavation of a single trial trench, dug to inform residential development at 21-25 St Catherines, Lincoln. A buried soil, containing fragments of 13th to 16th century medieval pottery and tile, was recorded, along with a number of pits, either cut into or sealed by the buried layer. The report also includes details of re-used architechtural fragments, identified at 21 St Catherines, prior to its demolition.