Miniscule (cursive) manuscript GA-1582 is actually a copy of the Family 1 text-type, but appears to some critics as an older or more primitive copy than manuscript GA-1 itself.
Additionally, 1582 has similar and unusual notes in the margins, of unknown origin, as follows:
The Ending of Mark:
At Mk 16:8 (σλγ) is a final decoration, and then (identical with Codex 1): [the following note:]
εν τισι μεν των αντιγραφων. εως
ωδε πληρουται ο ευαγγελιστης.
εως ου και ευσεβιος ο παμφιλου
εκανονισεν. εν πολλοις δε. και
Then follows 16:9-20.  In the margin at 16:19, the following is written in a tapering triangular shape:
ειρηναιος ο των
σιον. εν τωι προς
τας αιρεσεις τρι
τωι λογωι. τουτο
This marginal note is not found in Codex GA-1.
- from The Textual Tradition of the Gospels: Family 1 in Matthew by Amy S. Anderson (Brill, 2004), p. 68-69