Why does Mr. Bunting call the story of stranger the most remarkable story ?

Here is a quote from the book listing the stranger's "strangeness":

"The stranger did not go to church, and indeed made no difference between Sunday and the irreligious days, even in costume. He worked, as Mrs. Hall thought, very fitfully. Some days he would come down early and be continuously busy. On others he would rise late, pace his room, fretting audibly for hours together, smoke, sleep in the armchair by the fire. Communication with the world beyond the village he had none. His temper continued very uncertain; for the most part his manner was that of a man suffering under almost unendurable provocation, and once or twice things were snapped, torn, crushed, or broken in spasmodic gusts of violence. He seemed under a chronic irritation of the greatest intensity. His habit of talking to himself in a low voice grew steadily upon him, but though Mrs. Hall listened conscientiously she could make neither head nor tail of what she heard.
He rarely went abroad by daylight, but at twilight he would go out muffled up invisibly, whether the weather were cold or not, and he chose the loneliest paths and those most overshadowed by trees and banks. His goggling spectacles and ghastly bandaged face under the penthouse of his hat, came with a disagreeable suddenness out of the darkness upon one or two home-going labourers, and Teddy Henfrey, tumbling out of the “Scarlet Coat” one night, at half-past nine, was scared shamefully by the stranger’s skull-like head (he was walking hat in hand)...."