1- Owing to disputes between the Zarkun Afghans and the Marris, the Kohlu valley was brought under British protection in 1891. (Imperial Gazetteer of India by Sir William Wilson Hunter page 338)
2- The Isot and Zarkun are small offshoots of the original Pani stock, inhabiting respectively the Musakhel, Kohlu and Duki tahsils. (Census of India, 1921 - Volume 4 - Page 96)
3- According to Dr. O. T. Duke in his reports of 1883, " the Zarkuns, who are stated to have originally belonged to the Musakhel tribe, occupied some 300 years ago (in 1580s), Kohlu, Mamand, Gamboli and the neighbouring hills under their Sardar Firoz Khan. The Hasnis, who were expelled from Philawar by the Marris about 100 years ago (in 1783) tried unsuccessfully to take Kohlu from the Zarkuns. " In January 1876 the Masori Bugtis attacked and looted the Zarkuns who pursued the party and killed 14 of them. A few months afterwards another body of Bugtis, which came to revenge the death of their comrades, was attacked by the Zarkuns, and its leader Haidar Khan was killed with 28 others. The Marris fomented the strife and gave passage through their country to a force, consisting of nearly all the Bugtis led by their chiefs, the Zarkuns were outnumbered, the Kohlu valley was sacked, 70 Zarkuns and 27 Bugtis were killed. The Marris, who had previously acquired Gamboli and Mamand from the Zarkuns, invited them to return to Kohlu and the Marri Chief Ghazan offered them an offensive and defensive alliance against the Bugtis. The Zarkuns returned to Kohlu and Ghazan died soon after- wards. In July 1878 the Zarkuns, few and weak, yielded to the Marris, who took three-fourths of the valley themselves and left a fourth to the Zarkuns, MehruHa Khan, the Marri Sardar, taking Gulu Gozu as his panjiik (chief’s share)." Owing to the continued encroachments of the Marris, the Zarkuns were taken under British protection and in 1892 a sub-tahsil established in the valley. The chief occupation of the Zarkuns is agriculture and the headman is Dada Khan, Sharawani, who receives a monthly allowance of Rs. 45 as a Jemaddr of Levies and a special annual allow- ance of lOo maunds of grain and 50 maunds of blitisd (1905) (Mr. O.T Duke’s report on Thal-Chotili and Harnai district, compiled in 1883 A.D. Sibi district; text. Compiled by A. McConaghey page 67)
