Note FO — 1820
Reading edition
"The 'deep chasm' of this sonnet is identical with the 'passage cleft through the wilderness' of Sonnet XIV. It lies between the Pen on the left hand, and Wallabarrow Crag on the right. As to the niche, which forms the subject of the sonnet, it cannot now be identified. There are, of course, plenty of such niches in the crags which tower above the Duddon just here, but none more striking than the rest. From the fact that it was 'free from shrubs and mosses grey,' one may perhaps infer that it was a place in the cliff from which a mass of rock had recently fallen. The bed of the stream just here is a chaos of such masses of rock, some of them being of enormous size.
Mr. Chattock identifies the 'chasm' with that at Gowdrel, higher up the river—a view which, besides breaking the order of the sonnets, would seem to be excluded by Wordsworth's note on Sonnets XVII. and XVIII., wherein he expressly states that the scenery 'which gave occasion to the sonnets from the 14th to the 20th inclusive,' lies about Seathwaite. Mr. Chattock's remark that 'the rocks are columnar in character,' so that the fall of a fragment readily gives rise to the appearance of an elongated 'niche,' is worthy of note. It would probably apply to either chasm." (Herbert Rix.)
"I searched most carefully for some Gloomy niche, capacious, blank, and cold,
on Wallabarrow, but found none there sufficiently striking to suggest Sonnet XV. Standing at Newfield Farm and looking north to the Pen, where it rises beyond the ruined mill, there certainly is upon its southern face just such a niche, but the green ivy has displaced the 'gloom.'" (H. D. Rawnsley.)