The window in the end of the south chancel aisle was filled with stained glass designed by Bucknall and Comper of London, and donated by Mrs Lucy Edward-Collins, in memory of her husband, Revd.

Dr Sidney J. Madge, father of the incumbent Rector Revd Sidney Alfred Wilmer Madge, published in 1950 a good account of the church and its two patron saints entitled Blisland Church and its Patron Saints; a 2nd edition was issued in 1965 with a preface by John Betjeman.

Charles Henderson, writing in the Cornish Church Guide (1925) suggests that Lavethan (formerly Lanedewen) may record the original dedication of the church since the second element may be St Adwen (patron of Advent, Cornwall).

According to Betjeman: "As a restoration and even improvement on a medieval church, this holy and peaceful place ... can hardly be bettered in the kingdom.

"[4] In the church is the early 15th century brass of John Balsam, formerly rector here.