At the Wikisources, [[Special:UnconnectedPages]] is showing pages in the Page: namespace (for enWS) and correspondingly named namespaces at the other language WSes. The Page: namespace is a work area at the Wikisources, and none of these pages would normally be linked to a Wikidata item (ie. don't meet notability).
Basically Special:UnconnectedPages is swamped and its usefulness obliterated through the number of Page: ns pages that are being transcribed and filling the last 500. Can we please look to ignore the Page: ns for that special page.
- For later wikisources, the Page: ns has a standardised ns:ddd, however, for many of the earlier WSes there is no existing standardisation (though there is T74525 to achieve that).