The sculpture stands opposite the birthplace of Sewell in Church Plain, near the town’s minster, and was unveiled in a ceremony on 13 June.
Ms Cordelia, who painted the model in public view at Great Yarmouth Market Place during the summer of 2024, said: “I am extremely relieved to hear it is not a case of vandalism.
“It has been utterly heart-warming to hear so many appreciative comments since the piece was installed.
“Everyone told me how popular it has been. I very much appreciate the council working hard to resolve the issue swiftly and hope that Black Beauty will be back on full view very soon.”