From the longer Wikipedia page 
Islam Akhun was an Uyghur con-man from Khotan who forged numerous manuscripts and printed documents and sold them as ancient Silk Road manuscripts. Since the accidental discovery of the Bower Manuscript in 1889 such texts had become much sought after. The imperial powers of the time sponsored archaeological expeditions to Central Asia, including Britain, Russia, Germany, France and Japan.
It was in this competitive environment that Islam Akhun emerges. In 1895 he approached the British Consul in Kashgar, Sir George Macartney , with a number of manuscripts on paper. Some were in a script similar to Brahmi and the documents were in several different formats, many bound with copper ties. Macartney purchased the documents and sent them to India in the hope that Augustus Rudolf Hoernlé , a prominent scholar of Indo-Aryan languages, would be able to decipher them.
Unknown to Macartney, Islam Akhun's partner, Ibrahim Mullah, was also selling similar items to the Russian consul Nikolai Petrovsky . He sent them to St. Petersburg to be translated. Interestingly, Ibrahim Mullah had some knowledge of Cyrillic scripts, and so he incorporated Cyrillic characters, which proved very confusing for those scholars tasked with their translation.
Hoernlé set to work trying to decipher the texts.
Islam Akhun and his colleague continued to sell items to the British and Russian consuls. By this time, they had started to produce woodblok prints as it increased production. Macartney also sent these to Hoernlé who, in 1899, published a second report. He gave an extensive account and divided them into nine different groups based on the kind of scripts in which they were written, which resembled Kharosthi, Indian and Central Asian Brahmi, Tibetan, Uighur, Persian and Chinese. But despite his detailed analysis, Hoernle was still unable to interpret them.
Doubts were soon raised about the authenticity of the manuscripts. Questions regarding the remarkably good condition of the scripts, their fortuitous discovery and bizarre script were raised, in particular by the Swedish missionary in Kashgar, Magnus Bäcklund who had also been approached by Islam Akhun. Hoernlé discussed this issue in his 1899 report but decided in favour of their authenticity, recounting Islam Akhun's tale of the discovery of the manuscripts and documents in the ruined sites of the ancient Kingdom of Khotan in the Taklamakan desert.
It was, ironically, Hoernlé's report that re-asserted the suspicions of Aurel Stein  — renowned archaeologist and Indo-Iranian scholar — regarding the authenticity of the manuscripts. During his first Central Asia expedition in 1900 he visited ancient sites of Khotan but, although he excavated many manuscripts, he found nothing similar to those sold by Islam Akhun. Nor did any of the local residents have any knowledge of either the buried site or the artefacts found there. In April 1901 Stein tracked down Islam Akhun in Khotan and questioned him over the course of two days.
Initially Islam Akhun claimed innocence, insisting he had only been an agent for Macartney, and had himself purchased the documents from other parties, knowing how much the English desired them. He apparently did not remember the account of discovery he had supplied originally, and certainly did not realise it had been published. It is probable that Islam Akhun feared further punishment having already been received punishment for his desertion of a British group in 1898.
Faced with his own report, Islam Akhun eventually confessed to forging the manuscripts and blockprints and described to Stein not only the factory he set up with Ibrahim Mullah, but their methodology, which involved staining the manuscripts with dye from the poplar or Toghrug, and smoking them to create an aged effect. He also mentioned that although initially he and his partner had hand-written the manuscripts and made an attempt to copy the Brahmi script from genuine manuscripts, such was the demand that they had moved onto woodblock printing.
Stein did not take further action but ensured he captured Islam Akhun on film in a photograph that he later published in his expedition account Ancient Khotan.
Stein had the sensitive task of breaking the news to Hoernle, who was not only his mentor, but whom he had just succeeded in the post of Principal of the Calcutta Madrasah.
On his return to England, Stein met with Hoernle in his house in Oxford in July 1901. Hoernle hoped that his own report could be destroyed, but this was not possible as it had already been published. But he was able to edit the second part before it went to print.
Many of the forgeries remain in the collections of the British Library and the Institute of Oriental Manuscripts, St. Petersburg.