Bloodline
Darley is from the Ma’anagi Hidraji stud, which was originally from the Ma’anagi Sbeyli stud that Meq'ed Ibn H'ddri had looted from the Ibn Sbyel clan in a battle in the middle of 19th century. Thus, this unique stud had increased within his grasp and changed its name from Ma’anagi Sbeyli to Ma’anagi Hidraji except the ones that the Ibn Sbyel kept.
Read more about this topic: Darley Arabian