Mixed trains on the CNR?

[RobertInOntario]

I've been really enjoying Greg McDonnell's excellent book, "Canadian Pacific: Stand Fst, Craigellachie!" The photos in this book are excellent.

I noticed that, in the 1950s or so, the CPR often ran mixed trains -- i.e. a few freight cars, a combine and caboose. As I've noted elsewhere, I'm mainly a fan of British steam, and I know that they often ran mixed trains in the 1940s-50s, so I was a little surprised to find out that the CPR did this a fair bit as well.

Does anyone know if the CNR also ran mixed trains in the 1940s-60s?

Thanks,
Rob