Something very rare happened on the "May Two-Four Weekend" in 1915. A volcano that had been sleeping for about 27,000 years suddenly woke up at about 4:00 pm Saturday afternoon. Lassen Peak in northern California produced a violent explosion that ejected rock and pumice high into the atmosphere. This explosion was the most powerful in a series of eruptions from 1914 through 1917.
![]() |
The estate stamp typically in the lower right often resulted in some paint eventually flaking off. The panels salvaged from The Shack and organized in the Studio building all display the stamp. |
- March 13 – April 10: Ontario Society of Artists Forty-third Annual Exhibition, Toronto. Thomson exhibits Northern River, Split Rock and Georgian Bay Pines. Northern River is bought by the National Gallery of Canada for $500. His address is given as Studio Building, Severn Street.
- Mid-March: Arrives in Algonquin Park, via Huntsville, where he stays at the home of Winifred Trainor for two days; he travels to Tea Lake and Big Cauchon Lake; in the Kearney area, he stays at McCann’s Halfway House.
- A.Y. Jackson had returned to Quebec, evidenced by a letter to his sister Kate, dated April 18th, 1915, which he sent from Emileville Quebec. In it, he discusses his intention to join the army. His attestation papers show that he enlisted on June 14, 1915.
- April 28 – May 19: Thomson and George Rowe guide the Johnston Brothers of Pittsburgh, Pennsylvania to Pine River; they travel to Tea Lake. On their return, Thomson and Rowe travel to Big Bear Lake.
- May 24 Weekend...
- July 17: Assists H.A. Callighen in bringing tourists from Joe Lake Station to Smoke Lake by canoe.
![]() |
Sunset, Saturday May 22nd, 1915 |
![]() |
Sunrise, Sunday May 23rd, 1915 |
![]() |
Sunset, Sunday May 23rd, 1915 |
![]() |
Sunrise, Monday May 24th, 1915 |
In any event, Sunday supper on the Queen Victoria Holiday weekend would have been memorable - not only because of the "fireworks" in the sky. Annie Fraser, Shannon's wife was well known for her fine meals and baking at Mowat Lodge. (Note: May 24, Queen Victoria's birthday, was declared a holiday by the Legislature of the Province of Canada in 1845. After Confederation, Queen Victoria's birthday was celebrated every year on May 24 unless that date was a Sunday, in which case a proclamation was issued providing for the celebration on May 25.) The Great War was still raging in Europe and patriotic feelings would have been high.
![]() |
Tom Thomson circa 1905-1910 |
To really appreciate Tom Thomson, it is important to place his art within the context of the times in addition to the science and the weather.
What motivated Tom to record these weather observations? Tom must have been shocked to see the colours of the sunrise reaching into his bedroom window. I can imagine Tom grabbing his paint box and rushing out to the shore of Canoe Lake to chase the sunrise light before it disappeared. Tom was also a morning person... let's get going with the sun. Rise and shine.
Tom would have been eagerly waiting for the display of colours that the sunsets would deliver. That is why artists paint... we all chase the light in amazement at the beauty of nature ... and the weather.
Tom might not have understood all of the science and would certainly not have known that Lassen's Peak had just exploded - but he was truthful to what he saw. In that way, the science he recorded must also be accurate.
Warmest regards and keep your paddle in the water,