I believe that serial number range are "Irish Contract" rifles of which only 50000 or so were produced. In my opinion they will command a premium and will sell like hotcakes. There's one on the EE for $1350 right now. I'm interested in one if they are for sale at a bit more reasonable price.
Here is a link to another forum on the topic.
http://parallaxscurioandrelicfirearmsforums.yuku.com/topic/33924#.VYSkNMIcHVI
Tyson
The top one looks like it has the Ishapore screw through the stock, and if so that may lower the value slightly. The Ross on the bottom seems to have no bolt and it looks like there's a steel bolt threaded into the side of the receiver. Better pics on the Ross would be helpful as it may be a dewat. If it is, that would be a heartbreaker, but it would be very valuable still as a "parts" rifle.
True many MKII Ross' made it to England for training, but none were sent to France officially. The "myth" about soldiers keeping their service rifle is just that, a myth. Not to say the odd rifle didn't get "snagged" by someone over here from some remote base. Not to be confused with "private purchase Colt 1911's in WWI which were the soldiers legitimate property. I suspect those British made No.4's were donated to the hall from families of Veterans who acquired them in post war years. Are any of them marked with C-broad arrow on/near receiver? That would at least indicate they had been in Canadian inventory at some point.Lots of DEWATs have value to people who can't have the live guns. I have a few FA guns that are Deact and trust me they are collectible. A bolt rifle mush less so though because so many people can own them and shoot them.
Anyways, if your Veteran served in WWI or possibly even WWII he could have trained on a MkII Ross such as that one. Lots of pics of our troops training with them in WWI and at least one photo known of Commonwealth troops training with them in WWII.