The poem posted by Bob is a welcome addition to the small volume of Riel's verse. A beautiful little poem.
Several others are said to exist in various archives; I hope that they all can be collected into one volume before many more years pass.

The first line, "The snow---" reminds me of a device I have seen before in poetry, a statement which, after a pause, leads to the text.

Those interested in other poems by Riel may be interested in this small collection, to which I gave an incomplete reference before:
Glen Campbell, editor, 1993, "Selected Poetry of Louis Riel," 151pp., Paul Savoie, translator and illustrator, Exile Editions, Toronto. Paperback and not expensive, but elusive.

His "Poesies religieuses et politiques" of 1886 was reprinted (in French) in 1979, Les Editions des Plaines.