Artist Alvin Wong, founder of Hong Kong's Urban Sketchers group, poses with a drawing that he produced during the 2014 Umbrella Movement pro-democracy protests in the Admiralty district of Hong Kong
Illuminated under a spotlight at London's British Museum, hand-drawn sketches of Hong Kong's 2014 Umbrella Movement are part of a new exhibition on dissent that offers a rare glimpse of the artworks produced during the pro-democracy rallies.
The months-long demonstrations, which kicked off on September 28 four years ago, brought parts of the city to a standstill as protest camps took over areas normally clogged with traffic and commercial hustle.
Images of some of the thousands of posters, banners, drawings, sculptures, shrines and caricatures that adorned walls, bridges and roads in the tent-filled camps have been gathered online and in library archives.
But the original works have largely fallen out of view.
With Beijing tightening its grip on the semi-autonomous city and fears that freedom of speech is being curtailed through moves such as a ban on a pro-independence party and the prosecution of Umbrella Movement leaders, some feel it is safer to send the art abroad.
Fong So was one of dozens of local artists who sketched the protests and his works are on display as part of the British Museum's "I Object" exhibition.
He has given his entire collection of more than 100 Umbrella Movement sketches to the museum. A yellow umbrella, symbolic of the protest, printed with the lyrics of John Lennon's "Imagine", is also on display at the current show from an anonymous donor.
The movement earned its name after protesters used umbrellas to defend against police tear gas on September 28.
"I consider the collection of sketches a documentation of a piece of contemporary history. So, it's good to see it enter a museum", Fong told AFP.
He describes the political situation in Hong Kong as "more and more suffocating" and says he plans to send away other politically sensitive works.
Alvin Wong, founder of Hong Kong's Urban Sketchers group, brought together hundreds of sketches by 31 artists in a book entitled "Sketches under the Umbrella", published in 2015.
"All these sketches belong to Hong Kong people. We shouldn't keep them in our own sketchbooks. We have to tell everybody what we saw," Wong told AFP.
He has sent copies to libraries around the world, mainly in the United States, and says only a few bookstores in Hong Kong would stock it.
Politically sensitive titles have been steadily removed from many city bookshops, particularly since the disappearance in 2015 of five booksellers -- known for publishing gossipy accounts of China's political leaders -- who resurfaced in custody on the mainland.
- In storage -
Although Umbrella art and memorabilia were part of local exhibitions soon after the movement, the largest trove is now in storage at the Chinese University of Hong Kong's (CUHK) library, where the public can only view it as a digital catalogue.
The majority of works were donated by artists and activists who rescued them from the protest camps to create the Umbrella Movement Visual Archive.
The library collection ranges from scrawled slogans on placards to bags, jewellery, kites and sculptures, reflecting the fact that the public, not just accomplished artists, created the ad hoc landscape that became a hallmark of the movement.
But the whereabouts of some major pieces, including the famous 12-foot-high (3.6-metre) wooden "Umbrella Man" statue, remain a mystery.
Artist Sampson Wong, co-founder of the visual archive group, said they handed over the collection because they lacked the funds and manpower to preserve it.
The library is a "reliable institution", Wong told AFP, adding: "It preserves a part of the movement that in some years could be overlooked."
With the democracy camp still on the back foot after the protests failed to win political reform, there is little appetite among activists to mount a public exhibition of the works.
And with concerns over the erosion of freedoms, some who created or collected pieces may prefer to keep them to themselves, says Clarisse Yeung, co-founder of the visual archive, and now a district councillor.
Online photo collections like the wide-ranging Umbrella Movement Art Preservation Facebook page, put together by Hong Kong artist Kacey Wong, also provide a shareable digital resource.
But some feel the physical works should go on show once more.
Oscar Ho, Associate Professor of Practice in Cultural Management at CUHK, says Hong Kong's new government-funded art museum M+ should devote a gallery to the artworks.
"It's like the whole world is interested except the institutions of Hong Kong," says Ho, who has delivered lectures globally about Umbrella art.
M+ told AFP it was still "carefully evaluating this recent past" and would not currently consider Umbrella Movement works for its collection.
Hong Kong-born academic Dan Tsang, a former visiting Fulbright scholar at CUHK researching how to archive protest culture, says he is concerned that works not yet gathered from the public may be thrown away or sent out of the city.
"I think people like to touch and see the real thing, the actual artwork -- it's different from just looking at a digital image on a computer screen or phone," he said.