31 August – Saint Aidan

Mosaic by Frank Brangwyn in the Church of Saint Aidan in Leeds (complete set of photographs, about)

Modern Hagiography

Bibliotheca Sanctorum

Martyrologium Romanum

Roman Martyrology

Sanctorale Catholicum

A Menology of England and Wales

Lives of the Saints by Alban Butler.

Lives of the Saints by Sabine Baring-Gould.

Miniature Lives Of The Saints For Every Day In The Year by Henry Sebastian Bowden.

Stories of the Saints Fourth Series Saints of the Early Church by Mary Seymour.

Lives and Legends of English Saints by L.M. Shortt.

Medieval Hagiography

BHL, Supplement 

Acta Sanctorum

Bede, Ecclesiastical History (search for other mentions)

Art & Architecture

Index of Medieval Art

Post-Biblical Saints Art Index

at Tate Museum (no image available)

Saints and their Attributes

Lives and Legends of the English Bishops and Kings, Mediaeval Monks, and Other Later Saints by Mrs. Arthur Bell.

The Saints in Art by Joseph Maria von Radowitz.

Emblems of Saints by Which They Are Distinguished in Works of Art by F. C. Husenbeth.