First thus, defined
“First thus” means the first appearance of a work in this particular form — the first illustrated edition, the first paperback, the first edition by a new publisher, the first with a new introduction or translation. It is a genuine “first” of that version — but it is not the original first edition of the text.
Why dealers use it
You’ll see “first thus” in catalogue descriptions to honestly flag that a copy is the first of its kind without implying it is the true first edition. A 1961 illustrated Moby-Dick can be “first thus” (first with those illustrations) while the true first edition is 1851. Knowing the difference protects you from paying first-edition money for a later first-thus.
Frequently asked questions
Is 'first thus' a first edition?
No. It is the first appearance in a specific format or version, not the original first edition of the text. The true first edition is the earliest published form.
Is a first thus collectible?
It can be — a first illustrated edition or first paperback of a landmark book has its own following — but it generally sells for far less than the true first edition.