I've read the overview for the book but don't have a copy yet. On my wish list but I don't think it will cover what I was originally looking for on this thread. It probably would answer the things I was speculating on related to why the heavy mortar units received the T-16 in favor of the A/T units though.
Shot below is from the 1st Battalion Cameron Highlanders of Ottawa (MG) history. It shows a T-16 4.2" Mortar Carrier prior to Operation Switchback in October 1944. You can tell it is a mortar version by the angle iron rail bolted down the length of the hull where the normal side skirts would be bolted on. This shot appears in a couple of other publications but it has different captions when compared to the 1948 printed Cameron war diary.
And since you asked, I think this is an overhead shot of an Oxford Carrier. It says experimental in the caption so the layout could be different but the exterior would appear to be an Oxford based on the front fenders, front armor and the skirt area over the tracks. It comes from the old Profile AFV Weapons series and is the book titled Armoured Personnel Carriers - A Survey. Price was $2 back in 1974
