and a bit more from Mr. Thomas:

P. C. Atilla Rees, ox-broad, barge-booted, stomping out of Handcuff House in a heavy beef-red huff, black-browed under his damp helmet...

--Under Milkwood

Notice how in the the first-quoted excerpt Thomas chooses to use a hyphen for bible-black, but not for sloeblack or crowblack?...insert or delete hyphens as you will...poet's perogative!