Viv
i think the paper was being a bit ambitious in its attributions of the debris. Looking at a summary of work on the castle (
https://archaeologydataservice.ac.u.../Weoley_Castle_-_Archive_Appraisal_-_2011.pdf), which seems to indicate that record keeping was not very good in those days, the following quote is shown:
The Grill
Oswald, first interim report, page 64
“An iron grill, probably part of a window, and a wooden door with stone door
jambs was found, collapsed, in the moat as it fell northwards from the north-east
tower. The debris of the tower was covered by a third layer of clay and, therefore,
represents an early destruction; in fact, a deposit of builders rubbish between the
first and second layers of clay was noted all around the walls, that between layers
two and three being particularly heavy and clearly representing a complete remodelling
of the building, probably in the second half of the fourteenth century.”