Sentence:  He was thinking; but the glory of the song, the swell from the great organ, the clustered lights, […], the <WSD>height</WSD> and vastness of this noble fane, its antiquity and its strength—all these things seemed to have their part as causes of the thrilling emotion that accompanied his thoughts. 
Meaning of the word marked with <WSD> tags:  The distance from the base of something to the top.