Luckenbill’s two volumes were for decades the standard English access to the Assyrian royal inscriptions, and they remain the version that most freely available quotations trace back to. That is precisely why this record exists: a reader who meets the caged-bird passage online is almost certainly meeting Luckenbill, usually without being told.
Why it is listed as T2 and used with care
It is a scholarly translation by a competent Assyriologist, and it is a century old. Since 1927 the corpus has been re-edited from collated originals, notably in the Royal Inscriptions of the Neo-Assyrian Period series, which supersedes Luckenbill for the Sennacherib material both in readings and in the identification of which exemplar says what.
Where this site quotes a figure or a phrase from the Assyrian annals, the reading should come from the modern edition. Luckenbill is cited here because it is the text a reader is likely to encounter, and knowing what they are reading is part of what this archive is for.
How it is cited here
By Internet Archive identifier, which resolves to the item record and returns the title. The volume is in the public domain and can be read in full.