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After more than three years trying to drill down to the truth in Vancouver, I found the iPads at the McMichael Canadian Art Collection north of Toronto offered relief – if not quite the revelation I have been seeking.

Since early 2015, I have tried to get to the bottom of a mystery arising from a donation to the Vancouver Art Gallery of 10 oil sketches attributed to Group of Seven member J.E.H. MacDonald. The VAG announced the donation with great fanfare in January of that year – explaining that the “newly discovered and never-before-displayed oil paintings” had been buried for more than 40 years at the property in Thornhill, Ont., where MacDonald lived. “Following a remarkable history, 10 rare artworks will be made accessible to the public for the first time since their creation,” the news release stated.

Open this photo in gallery:

J.E.H. MacDonald's Moose Lake, Algoma,1920, oil on paperboard.

But when questions arose about the sketches, the VAG grew quieter. It had the Canadian Conservation Institute (CCI) study some of the works, but despite repeated inquiries from The Globe and Mail, gallery officials have declined to reveal the results of the report, which was delivered to the VAG in September, 2016, according to the CCI. (The CCI is a special operating agency of the Department of Canadian Heritage that provides conservation expertise and services to Canadian museums, including scientific testing of historical art.)

Prior to the testing, the CCI had told The Globe: “Through our scientific examination, we will be able to determine if the materials of the VAG works are consistent with those of the J.E.H. MacDonald works studied as part of our project.”

Ahead of the donation, the sketches had been authenticated by Ian Thom, who has a stellar reputation as one of the country’s top experts in historical Canadian art. He has declined to discuss the results of the CCI study with The Globe. When asked once again whether Thom would talk about this ahead of his retirement from the VAG as senior curator-historical in June, the gallery declined, and instead sent a statement. “As there are varying opinions about the authorship of some of the JEH MacDonald paintings acquired by the Gallery, these works have been and will continue to be the subject of further study.”

Now, to Kleinburg, where the McMichael’s exhibition J.E.H. MacDonald: Up Close features more than 75 works by the painter and offers a fascinating, forensic window into his process – thanks to the CCI.

Five years ago, the McMichael and the CCI began an in-depth conservation survey of MacDonald’s works. Thirty-two works from the McMichael, the National Gallery of Canada and the Art Gallery of Ontario including 21 oil sketches and 11 larger paintings were examined.

The goal was to uncover information about how MacDonald created his work, including his choice of materials and painting techniques. Paint samples were put under the microscope; paintings were examined with ultraviolet illumination; chemical analysis was performed.

At the exhibition, iPads are installed next to a number of MacDonald works. Swiping through the findings, you see magnified cross-sections and microscopic images blown up to reveal details in the board, pigment dispersion, composition structure, brushstroke patterning and more – along with simple, layperson-friendly explanations.

Open this photo in gallery:

The Canadian Conservation Institute survey of J.E.H. MacDonald's work found that the artist came to prefer using a lightweight bookbinding board, which eased the load while travelling out in the wildernessm as he would have done during his Algoma period, producing work such as Moose Lake, Algoma.

“What I didn’t want the exhibition to feel like was a kind of science exam; I didn’t want people to come out of the show thinking right, where’s the test?” Ian A.C. Dejardin, the McMichael’s executive director, told me ahead of my visit. “The information’s there if you want it, but we don’t rub anyone’s noses in it.”

Au contraire: The window into these findings was illuminating; the transparency, refreshing. After years of unsuccessfully trying to find out what the CCI had discovered about the MacDonald paintings acquired by the VAG, here in full colour was what the CCI had discovered about paintings known to be by him.

The McMichael/CCI study reveals a maturation of MacDonald’s process – from laboured paint application in his early works to multilayered, wet-over-wet brushstrokes, to more directional brushstrokes. The research identified favourite pigments – and showed that MacDonald rarely used black. The study also found that MacDonald grew to prefer a lightweight kind of bookbinding board to ease the load when transporting equipment out into the wilderness, as he did in his seminal Algoma period.

“There’s no kind of Dan Brown discovery here,” Dejardin says, referring to the author of The Da Vinci Code.

The project has allowed for the creation of a database of MacDonald’s materials and techniques. In a video made for the show, CCI senior conservation scientist Kate Helwig explains that the database can help when there are questions of attribution. “If there’s an unknown painting, we can look at the materials in that work and then compare it to the materials in our database to see if they’re consistent with what MacDonald used during a certain period.”

After returning from Kleinburg, I contacted the VAG again to inquire whether there were any updates regarding the paintings and repeated my request to see the CCI findings. The VAG – a public institution funded in part by taxpayer dollars that is currently trying to raise money for a new, purpose-built gallery – re-sent me the same statement.

Despite initial promises to make the paintings accessible, they have yet to be publicly displayed.

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