Definition of "abele"

But I account for my predilection, by the kind of pensive and melancholy peasure I used to feel, when in my childhood and early youth, I walked alone, in a long avenue of arbeal […] .

1792, Charlotte Smith, Desmond, Broadview, published 2001, page 114

Six abeles i' the churchyard grow

1844, Elizabeth Barrett Browing, The Rhyme of the Duchess May, line 5