As promised. The two main opposing rifles used during the Second Boer War 1899-1902. The British Lee Metford and the German Mauser 7mm, model 1895.
The longer rifle on top is the Mauser. You will note the markings on this particular rifle are stamped "Chile". The Boer govt ordered 70,000, but only approx 55,000 were delivered, some of the remaining were remarked and sold to Chile.
This particular Lee Metford was a New Zealand issued rifle, hence the NZ stamped on the receiver (NZ had some 6.5K personnel serving during the Second Boer War).
The photos looking into the magazine/chamber show the magazine cutoff. A device that was was used to during battle to stop the magazine being engaged, making the men load the rifles as a single shot, until such time rapid fire fire was needed, when the order would be given to open the mag cutoff, and the 10 rounds contained in the magazine could then be utilized. Incidentally, the magazines were never meant to be removed and replaced in order to reload ammo. (As I said, the Lee Metford was loaded with single rounds) early rifle magazines were fixed to the rifle via a chain (the magazine could be removed for cleaning). Later Lee actioned rifles MKIII etc... were loaded via a stripper clip.
The last photos show the volley sights of the Lee Metford. The Lee Metford had two separate sets of sights. The standard V notch sights which ranged up to 1,800 yrds, and the volley sights which ranged up to 2,800 yrds. The volley sights were used in a pre machine gun Army, indirect fire role. E.G. Lining up a platoon/company etc... and using them to lay fire on enemy Artillery positions.