The on-disk Jerome capture carries no Acragas foundation entry, so no competing reading is quoted.磁盘所见哲罗姆抓取本无阿克拉加斯建城条目，故不列异读。
The accounts记述 · the ancient witnesses
Greek historians · 希腊史家
Thucydides — History of the Peloponnesian War （修昔底德·伯罗奔尼撒战争史）primary source · 源典
§ 6
Thuc. 6.4.4 — near 108 years after the foundation of Gela; founders Aristonous and Pystilus修昔底德 6.4.4——约在革拉建城后 108 年；建城者阿里斯托诺斯与皮斯提洛斯
Diodorus Siculus — Library of History （狄奥多罗斯·历史丛书）witness · 见证
Provenance: “primary source” = curated canonical witness (editorial); “dated witness” = derived from the ToposText date index by year-span, with the matched loci count. Sparse counts may include incidental mentions.出处：「源典」为校订之正典见证（编辑判断）；「系年见证」由 ToposText 系年索引按年代跨度推得，附匹配条目数；稀少者或含偶涉。
On the timeline时间轴上
→ See this and all 18 historians on the chronology spine于编年脊柱上一览本事件与全部 18 位史家