[1] He was known to have been an intelligent boy from a young age, as well as for being an avaricious eater, leading him to being frequently scolded by his older brother as the household was struggling with the cost of living.

His simple methods of further sub-classification, which were easier to learn and less prone to error than Galton's, meant that even a collection numbering in the hundreds of thousands could be divided into small groups of slips.

Hem Chandra Bose, another Indian police officer, who worked with Haque and Henry, subsequently contributed to the development of the telegraphic code system for fingerprints.

Sodhi and Jasjeet Kaur published an extensive research paper on the issue of the two Indian police officers' contributions to fingerprint development.

[5] In their paper, they quote The Statesman, which published an article dated 28 February 1925 entitled, 'Indian affairs in London,' which stated, "A Muhammadan Sub-Inspector played an important and still insufficiently acknowledged part in fingerprint classification."

761 PR, dated 15 June 1925): "Azizul Haque was… allowed to start research work upon a method of classifying finger prints, and after months of experiment he evolved his primary classification which convinced Sir E.R.

At the time of final approval of the honorarium, the Home Department (Government of India) noted, "It appears from the information now received that he (Haque) was Sir Edward Henry's principal helper in perfecting the scheme and he actually himself devised the method of classification which is in universal use.

The Honorary Secretary of the Indian Police (UK) Association, where Mitchell asserted, "that it had been Haque who, in 1897, had explained the classification to the government committee investigating the utility of fingerprinting."

Michell, in that letter, further stressed that "the work of Azizul Haque and Hem Chandra Bose should be commemorated and that their names should be on record in India and in this country (UK)."

While this has not yet transpired, their advocacy role, in collaboration with others, has resulted recently in the establishment, by the UK Fingerprint Society, of a research award in the names of Haque and Bose.

Haque's unique contribution to fingerprinting development technique is recently noted in an article by Clive Thompson in the April 2019 issue of Smithsonian magazine.

Azizul Haque, the head of identification for the local police department, developed an elegant system that categorized prints into subgroups based on their pattern types such as loops and whorls.

He had eight surviving children with his wife, Jubennessa, including four sons, Amin, Asir, Ikram, and Mati, and four daughters, Akefa, Amena, Arefa, and Abeda.