An 1825 Persian text titled 'History of the Origin and Distinguishing Marks of the Different Castes of India' was written by James Skinner, a Scottish-Indian lieutenant-colonel who served in the British military.
Notes on verification
Confirmed by multiple independent sources including Wikipedia, Perso-Indica, and Library of Congress; minor nuance that Skinner held the rank of Lieutenant-Colonel formally in 1828, three years after the text's writing.
Sources
- The Library of Congress Has Digitized 155 Persian Texts Dating ... (smithsonianmag.com)
- http://perso-indica.net/work/treatises_of_mixed_contents/tasrih_al-aqwam (perso-indica.net)
- https://www.loc.gov/exhibits/thousand-years-of-the-persian-book/science-and-technology.html (loc.gov)
- https://military-history.fandom.com/wiki/James_Skinner_(East_India_Company_officer) (military-history.fandom.com)