<a href="https://en.wikipedia.org/wiki/Abdur_Rahman_Khan" class="extiw" title="w:Abdur Rahman Khan">Abdur Rahman Khan</a>
Archibald Forbes (author)
"<a rel="nofollow" class="external text" href="https://archive.org/details/afghanwars18394200forbuoft">The Afghan wars, 1839-42 and 1878-80</a>", as digitised by the <a href="https://en.wikipedia.org/wiki/Internet_Archive" class="extiw" title="w:Internet Archive">w:Internet Archive</a>'s <a rel="nofollow" class="external text" href="https://archive.org/details/texts">text division</a>