You may be tempted, reading Kentigern, to sort what is verifiable from what is only remembered, and to keep the first and set the second aside. Notice what happens if you do. The bare, documented Kentigern is a name in an annal beside a date nobody can fix. Everything else that has shaped a city for eight hundred years, the robin, the ring, the mother in the rudderless boat, comes to you as memory the church chose to keep, in a book written by a man who never met him. That is how you have received almost everything you believe, including the parts you would not part with. So the question is not whether you can prove it. Where have you been quietly discounting what was handed to you, simply because it came to you through someone else's hands?

Almost everything told above comes from one hand. Jocelin of Furness, a Cistercian, wrote the Life of Kentigern for Bishop Jocelin of Glasgow between about 1175 and 1199, finishing in time for the cathedral's consecration on 6 July 1197, roughly five hundred and eighty years after his subject died. An earlier Life, commissioned by Bishop Herbert of Glasgow between about 1147 and 1164, survives only as a fragment, and it breaks off long before the adult ministry, so it checks Jocelin on the birth story and nothing else. Jocelin himself says in his prologue that he reworked the Glasgow legend together with an old volume written in the Irish style whose language he found intolerable. The coracle, Servanus, the robin, the wolf at the plough, the Welsh exile, the ring in the salmon, the meeting with Columba, the pilgrimages to Rome, the death in the warm bath: all of it reaches us through that one commissioned book.

Outside it, four things stand. The Annales Cambriae record, under a year editorially reconstructed as 612, the death of Kentigern and bishop Dyfrig; that is the only notice of him anywhere that is not a saint's life, and the edition's own note warns that the A-text carried no years at all and that the dates now printed are disputed within about five years. Adomnán of Iona, writing about 697 to 700, knows King Roderc son of Tothal, who reigned at the Rock of Clyde, and records Columba's prophecy that he would die at home on his own pillow; scholarship takes him to be Jocelin's Rhydderch. The battle of Arfderydd in 573, which Jocelin's chronology leans on, is independently recorded. And Alexander Penrose Forbes printed the Latin and English of both Lives in 1874, which is why we can read them at all; no later critical edition has superseded it.

The death year is genuinely open. Tradition and most reference works, including our own calendar, give 603; the annal gives 612; 614 also circulates. The argument usually made for 603 is that 13 January fell on a Sunday that year, which is true, but 13 January 614 was also a Sunday, so the test does not discriminate. Jocelin's own chronology tells against 603 rather than for it: he states that Kentigern died at one hundred and eighty-five years old, and it is only William Forbes Skene's emendation of that figure to eighty-five that lets a birth around 518 meet a death in 603. The honest position is that a bishop of that name and region died on a 13 January in the early seventh century, and that the year cannot be settled from what survives.

Two further things the tradition's own literature concedes. The fostering by Servanus cannot stand as told, because Servanus belongs to a later period than Kentigern's childhood requires; Skene showed it in the nineteenth century, and the Catholic Encyclopedia of 1910 prints the caution itself. And modern work, by John Reuben Davies in 2009 and Dauvit Broun in 2007, has found little evidence of widespread interest in Kentigern before the twelfth century, which means the veneration we can document is largely the veneration the reformed diocese of Glasgow deliberately built. The Welsh connection at St Asaph is likewise regarded now as a probable later graft, and St Asaph's own historical materials say frankly that there is no archaeological evidence or written record there before the twelfth century. None of this touches the bare fact of the man. It does mean that with Kentigern, more than with most, "the tradition holds this" and "this is documented" are frequently the same sentence, and the difference is worth keeping in view.

Glasgow's arms carry four emblems, and every one of them is an episode from Jocelin: the robin restored to life, the frozen hazel branches that rekindled the monastery fire, the bell said to have been a papal gift, and the salmon with the queen's ring in its mouth. Glasgow schoolchildren still learn them by rhyme: Here is the bird that never flew / Here is the tree that never grew / Here is the bell that never rang / Here is the fish that never swam. His mother is venerated in her own right as St Thenew, or St Enoch, co-patron of Glasgow with her son, with a feast on 18 July and her name still on St Enoch Square. His relics were translated to a new tomb in the cathedral on 6 July 1197, a summer date chosen to sit with the burgh's fair rather than with the hard January feast, and offerings followed for a century: Alexander III founded an altar to him in 1284 after three of his children died. The Reformation stripped the shrine, and almost nothing portable survives; a carved thirteenth-century fragment of the tomb is still on display in the cathedral, and where his body went is now folklore rather than record.

Almighty and everlasting God, you called your servant Kentigern to preach the Gospel to the people of Strathclyde: Raise up in this and every land evangelists and heralds of your kingdom, that your Church may proclaim the unsearchable riches of our Savior Jesus Christ; who lives and reigns with you and the Holy Spirit, one God, now and for ever. Amen.

• Kentigern (KEN-tih-gurn)/ˈkɛntɪɡɝn/
• Strathclyde (strath-KLYDE)/stræθˈklaɪd/

British (Received Pronunciation): Kentigern /ˈkɛntɪɡɜːn/

Readings for a Missionary

Isaiah 49:1–7 · Psalm 98 · Romans 10:11–18 · Luke 5:1–11