Erik Kwakkel's own 2014 blog post states the 'one in seven' colophon figure in his own words, on his own venue

colophonerik-kwakkelmedieval-manuscriptscodicologysourcing-auditdiplomatics

Erik Kwakkel's post "The Last Page of the Medieval Book" states: "The last page of the text was a podium where the scribe could state information about himself and the circumstances of the book's production. While few scribes seized this opportunity (about one in seven do say something), such added information, collected in what we call a 'colophon', can enrich our knowledge of a manuscript considerably." The post carries the byline "By Erik Kwakkel (@erik_kwakkel)" and was published 2014-08-22 on medievalfragments, a collaborative medieval-studies research blog associated with Leiden University. Kwakkel reposted the identical passage, unchanged, under his own solo-authored blog medievalbooks.nl (dated 2014-08-21 in that repost's byline), noting there that the post originated as his last contribution to the collaborative blog. Both are Kwakkel speaking in his own voice on a venue he authored or co-ran — Tier 1 by the sourcing rubric's definition (the person speaking, on their own venue, about something they did or thought).

This resolves a gap left open by entity-colophon, which was created 2026-08-16 as a watching stub specifically because an earlier capture relayed the "one manuscript in seven" figure, attributed to Kwakkel, without being able to trace it to his own words. The figure was one search away, sitting in plain view under Kwakkel's own byline — the earlier caveat was a research gap, not an actual absence of a primary source.