▁who ▁has ▁recently ▁argued , ▁using ▁an ▁absence ▁of ▁evidence ▁is ▁not ▁evidence ▁of ▁absence ▁approach , ▁that ▁the ▁Mac D onn ells ▁did ▁in ▁fact ▁gain ▁the ▁upper ▁hand ▁to ▁become ▁dominant ▁in ▁the ▁Gl ens ▁following ▁the ▁marriage ▁of ▁Marg ery ▁By set ▁to ▁John ▁M ór ▁Mac D onn ell . ▁His ▁approach ▁dis reg ards ▁the ▁lack ▁of ▁a ▁Mac D onn ell ▁presence ▁in ▁the ▁Irish ▁sources ▁and ▁English ▁ones ▁covering ▁Irish ▁affairs ▁in ▁favour ▁of ▁assuming ▁the ▁accuracy ▁of ▁the ▁Mac D onn ell ▁claims ▁and ▁styles ▁prior ▁to ▁the ▁ 1 5 2 0 s . ▁What ▁is ▁unknown ▁is ▁whether ▁the ▁B isset ts ▁ever ▁recogn ised ▁the ▁nom inal ▁over l ord ship ▁of ▁the ▁much ▁more ▁powerful ▁Scottish ▁dynast y ▁still ▁based ▁in ▁the ▁Western ▁Is les , ▁a ▁different ▁species ▁of ▁submission ▁from ▁giving ▁up ▁their ▁lord ship ▁itself . ▁If ▁so ▁then ▁the ▁Mac D onn ell ▁claims ▁could ▁be ▁understood ▁differently , ▁but ▁remain ▁un ver ifiable . ▁Kenneth ▁Nich oll s ▁finds ▁B iss ett ▁accept ance ▁of ▁the ▁Mac D onn ell ▁intr usion ▁unlikely ▁and ▁military ▁ret ali ation ▁probable . ▁ ▁Ear ld om ▁of ▁An trim ▁The ▁Mac D onn ells ▁were ▁still ▁pressing ▁their ▁claim ▁based ▁on ▁their ▁" in herit ance " ▁and ▁descent ▁from ▁Marg ery ▁and ▁the ▁Baron ▁( Mac ▁E oin ) ▁B iss ett ▁into ▁the ▁ 1 7 th ▁century . ▁After ▁Rand al ▁Mac D onn ell