The essay discusses how C.S. Lewis incorporated elements from Arthurian literature into his novel That Hideous Strength. Some of the Arthurian features Lewis included are direct references like the leader Ransom being called "Mr. Fisher King," a reference to the wounded King Fisher from Arthurian legends. Lewis also alludes to older Arthurian stories through scenes like one character searching for Merlin in the woods. These references and allusions help Lewis emphasize themes in his own story while connecting it to older Arthurian tales.