This is symbolic but also 'interesting' .... remember it supposedly helps to describe the current surroundings around the McCann's.
Wikipedia, 'the Fisher King':
The Fisher King or the Wounded King figures in Arthurian legend as the latest in a line charged with keeping the Holy Grail. Versions of his story vary widely, but he is always wounded in the legs or groin, and incapable of moving on his own. When he is injured, his kingdom suffers as he does, his impotence affecting the fertility of the land and reducing it to a barren Wasteland. Little is left for him to do but fish in the river near his castle Corbenic. Knights travel from many lands to heal the Fisher King but only the chosen can accomplish the feat. This is Percival in the earlier stories; in the later versions Percival is joined by Galahad and Bors.
Confusingly, many works have two wounded Grail Kings who live in the same castle, a father (or grandfather) and son. The more seriously wounded father stays in the castle, sustained by the Grail alone, while the more active son can meet with guests and go fishing. For simplicity, the father will be called the Wounded King, the son the Fisher King where both appear in the remainder of this article.
