Sir HD was never inducted in 3rd Regiment of Punjab Cavalry as the author claims. He was inducted on September 16, 1900 as per British records, which I can produce. Sir HD did not become Risaldar Major of 3rd Regiment of Punjab Cavalry at the age of 15 in 1895. It was actually in 1913 at the age of 32.There was no Husamuddin in the regiment in 1895.
Sir HD was never made the Risaldar Major directly. As per British records, he joined as a Jemadar on September 6, 1900, became Resaidar on November 25 1901, became Risaldar on October 1, 1908 and Risaldar Major, which General Ali Hamid claims as 1895, only 18 years later on July 1, 1913.
The remotest chance that HD joined 3rd Punjab Cavalry in 1895 or 1896 does not exist and that too as Risaldar Major. HD joined service on precisely September 16, 1900.
On October 7, 1919 Sir HD was commissioned in 23rd Punjab Cavalry which had been renumbered as such in 1903.