Aber siglen (Field).
Grid Reference: SJ 13971 61642. Parish: Llanbedr-Dyffryn-Clwyd, Denbighshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Berth siglen (Field).
Grid Reference: SH 83348 78445. Parish: Llandrillo-yn-Rhôs, Denbighshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Bwlch Siglen (Unclassified).
Grid Reference: SH 83262 13691. Parish: Mallwyd, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Bwlch-siglen Slate Quarry (Unclassified).
Grid Reference: SH 83715 13906. Parish: Mallwyd, Merionethshire
When recorded: 1898-1908. Primary Source: OS 2nd Edition Maps. Secondary Source: GB1900 website

Cae Siglen (Field).
Grid Reference: SN 64886 88325. Parish: Ceulan-a-Maesmor, Cardiganshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Cae siglen (Field).
Grid Reference: SH 89691 32932. Parish: Llanycil, Merionethshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Cae Siglen (Field).
Grid Reference: SJ 08806 22659. Parish: Llanrhaeadr-ym-Mochnant, Montgomeryshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Cae siglen (Field).
Grid Reference: SJ 30740 41937. Parish: Ruabon, Denbighshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Cae Siglen (Field).
Grid Reference: SN 64886 88325. Parish: Ceulan-a-Maesmor, Cardiganshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin

Cae Siglen (Field).
Grid Reference: SJ 14525 09219. Parish: Castle Caereinion, Montgomeryshire
When recorded: 1841. Primary Source: none. Secondary Source: Cynefin