balue

After Lat. i the v disappeared (rivus-um, Span. rio), but in most other cases it remained as a bilabial spirant euqal in balue to originally intervocalic b (novus-um, Span. nuevo).

The Catholic Encyclopedia, Volume 14: Simony-Tournon 1840-1916 1913

I think it brings balue to the reader, and with that bring value back to the author.

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Thus she led him through all the gradations of difficulty, and obstacles, necessary to enhance the balue of the prize he aimed at; and in conclusion, he was so struck with the little beauty I was mistress of, and so eagerly bent on gaining his ends of me, that he left her even no room to boast of her management in bringing him up to her mark, he drove so plum of himself into every thing tending to make him swallow the bait.

Memoirs of Fanny Hill. 1749

Thus she led him through all the gradations of difficulty, and obstacles, necessary to enhance the balue of the prize he aim'd at; and in conclusion, he was so struck with the little beauty I was mistress of, and so eagerly bent on gaining his ends of me, that he left her even no room to boast of her management in bringing him up to her mark, he drove so plum of himself into every thing tending to make him swallow the bait.

Fanny Hill, Part VIII (second letter) 1749