[1] The manuscript contains all the Church lessons from Easter to Pentecost, for every Saturday and Sunday for the rest of the year.

[3] The supplied leaves are also written in uncial letters, but in a widely in different style, "with thicker downstrokes and very thin upstrokes".

[2]: LX It contains music notes and portraits of the Evangelists in colours and gold before each Gospel (folios 1v, 63v, 94v, and 131v).

[2] The decorations are zoomorphic (birds, fishes) or anthropomorphic (human figures, hands, other body parts), also harpies, or vases.

The large initial letters are rubricated, the headpieces are decorated in colours and gold (folios 1r, 64r, 95r, 132r, and 238r).

[2]: LX There are many marks in red ink, some erasures and corrections made by a later hand.

[2]: LX The text of the codex is considered a representative of the Byzantine text-type and it is closer to the Textus Receptus than many other manuscript of much later date, but some readings of the codex can be found in the uncial manuscripts: Alexandrinus (A), Vaticanus (B), Ephraemi recriptus (C), Bezae (D), Cyprius (K), Regius (L), and Campianus.

[2]: LXI It has also a number of unique readings in following texts: Matthew 2:15; 3:16; 9:10; 17:17; 20:5; 23:35; 24:4.42.43; 27:1.56; Mark 1:7; 6:8.10.16; 12:30.32; 13:11; 15:26.33; Luke 7:24.28; John 1:29; 7:41; 8:44; 12:20.35.47; 15:8; 18:33.

Scrivener stated that on the palaeographical ground it should be dated earlier, even to the 7th or 8th century, but liturgical books usually were written in an older letters than in other documents.

[4] Then it belonged to Henry Howard (1628–1684), 6th duke of Norfolk, who presented the manuscript to the "Royal Society" in London in 1667 (along with Minuscule 476 and Lectionary 187).

Scrivener stated: "I regard Codex x – Lectionary 183 – as perhaps the most valuable manuscript I have collated.

"[2]: LX The manuscript was not known for Johann Martin Augustin Scholz and it was not catalogued in his list.

[1] It was examined by Walter de Gray Birch and Henry Jenner, E. Maunde Thompson, J.