Corrigendum

The modern eye may interpret this marginal message as a word balloon, but the tail is merely decorative, I believe. The red cross indicates the point of insertion.

Baudri de Bourgueil, Historia Hierosolymitana; Historia Danica; Pseudo-Cornelius Nepos, Pseudo-Dares Phrygius, De Excidio Troiae Historia; Historia Apollonii Regis Tyri; Historia Alexandri Magni; Pseudo-Alexander, Epistola Alexandri ad Aristotelem; Collatio Alexandri et Dindimi; Geoffrey of Monmouth, Historia Regum Britanniae
Source: British Library
Stowe ms 56, f.167v.