Hello Hugo,
Yes, I have Christopher Draper's book and thoroughly enjoyed reading the history of the town.
I know the old grammar school building well,plus the area round Church Walks/ Cwlach Street.
I wondered whether Daniel Philips might have had a connection with the Wesleyan Chapel with him living in the Chapel House? In those days it was usual for the minister, or incumbent, to reside in the vicinity of the chapel.
Helig.