1. High garden wall of stone rubble with coping. RCAHMW, 1st January, 1993.

2. The garden wall is depicted on the Second Edition Ordnance Survey 25-inch map of Brecknockshire XXVIII, sheet 9 (1904). C.H. Nicholas, RCAHMW, 8th August 2006.

3. Garden wall, as above, to the rear of the earlier nineteenth century Nos. 18-21 Castle Street (NPRN 308522) and thought to be a contemporary feature.

Source: CADW Listed Buildings Database (6861)