Navigatio Brendani

Navigatio Brendani 1.10:

occurrērunt obviam, sīcut exāmen apum, ex dīversīs cellulīs, frātrēs.

The cells for Irish monks at this period seem to have been individual one-room huts, built of branches or (in the west where wood was scarce) of dry stone. This is an artist's imagining of the monastic community, based on excavations at Reask, County Kerry. 

See T. Fanning, “Excavation of an Early Christian cemetery and settlement at Reask, County Kerry," Proceedings of the Royal Irish Academy 81C (1981) 67–172.

A paten of the 8th or 9th century, found in 1980 with four other liturgical utensils (including a chalice) near Killenaule, County Tipperary.

A chalice of the 8th or 9th century, found in 1980 with four other liturgical utensils (including a paten) near Killenaule, County Tipperary.  

Navigatio Brendani 12.43:

et eōrum vāscula similiter dē cristāllō, īdēst patēnae, et calicēs, et urceolī, et cētera vāsa quae pertinēbant ad cultum dīvīnum.

A medieval drinking horn with brass (rather than silver) fittings, in the NTNU University Museum, Trondheim, Norway.

Navigatio Brendani 6.20: 

cornibus circumdatīs argentō

A modern bridle for sale (on Etsy) as a "Celtic bridle."  Whether or not it reflects Irish archaeological finds, it gives an idea of how a horse's bridle could be decorated with silver.

A fourth century figurine depicting Jonah being swallowed by the sea creature.  The story, told in the short Old Testament Book of Jonah, was understood by Christians as a foreshadowing of the death and resurrection after three days of Christ.

The Azores (now part of Portugal) and the Atlantic Ocean. The association with Island of Ailbe is plausible, but not supported by evidence.

Navigatio Brendani 12.2:

appāruit illīs īnsula nōn longē 

Mount Pico, on the island of Pico, Azores, as seen from island of São Jorge. The association of the island of Ailbe with Azores is plausible, but not supported by any evidence.

Manuscript illumination from the famous Book of Hours, the Très Riches Heures du duc de Berry (1411–1416). God on his throne is surrounded by the Seraphs. Satan / Lucifer and the rebel angels fall into Hell, and fought off by Michael and his angels (depicted as knights).

Navigatio Brendani 11.17:

Nōs sumus dē illā magnā ruīnā antīquī hostis

A pair of ptarmigans, in their white winter plumage (near Glencoe, Scotland).

Navigatio Brendani 11.8: 

avibus candidissimīs