1) A dialect spelling of ‘sole’.
1383-4 ij dies facientium pyles, soilles & trabes & cum eisdem emendacionem ... defectus stagni molendini, Leeds
1501 to bild up right from his soile tre upward, York
1612-6 all the tymber that shalbe needful for ground works … also sufficient soyle trees … and plankes for the whole forebaye, Golcar
1667 Paid R. Nayler for 1 Soyle tree for church gates 5s, Bradford.