trainstation

"Salt Lake City, Utah"

Built in 1882, the heritage-listed Maryborough Railway Station features a Victorian design. The stationmaster’s residence has much of the character of larger Queensland houses of that era. The railway complex also houses the Whistlestop Museum, which documents Maryborough’s impressive rail history. The first sod for the railway line from Maryborough to Gympie was turned in 1878, with pick and shovel gangs completing the project in three years. In 1895, the district boasted 300 items of locally made rolling stock. Maryborough has long been a major supplier of steam, diesel-electric and electric trains and train carriages in a railway history that began in 1873. The railway station also has an air raid shelter built during the Second World War in viewing distance. Source: www.visitfrasercoast.com/product/old-maryborough-railway-...

“The South Irish Horse was a Special Reserve cavalry regiment of the British Army. Formed as an Imperial Yeomanry regiment in 1902 as the South of Ireland Imperial Yeomanry, it perpetuated a unit formed during the Second Boer War. It transferred to the Special Reserve (Cavalry) in 1908 and was renamed as the South Irish Horse. Having taken part in the fighting of World War I, it was disbanded after Irish Independence in 1922.”
- en.wikipedia.org/wiki/South_Irish_Horse

“taken in Russia?”
Sound unlikely

www.mordaunt.me.uk/my%20family%20history.html

They do look very cold, unusual to see troops wearing scarves?

Russia seems very unlikely.

“On 12 June 1922 King George V received at Windsor Castle representatives of the six disbanded Irish regiments. While five had long and distinguished service records, the South Irish Horse (SIH) had only been raised in 1902, as a result of the second Boer War, but too late to take part.
On the outbreak of The Great War a single squadron of the SIH was sent to Flanders which was involved in the retreat from Mons and the Marne and the early battles of Ypres, Neuve Chapelle. The remainder of the Regiment followed and over the next four years, won ten battle honours including Loos 1915, Somme 1916 and 1918, Albert, St Quentin, Courtrai and finally France and Flanders 1915-1918. Losses were severe and there were many acts of gallantry.”

www.naval-military-press.com/product/south-irish-horse-in...

Perhaps it's a sign of the times, but none of them could be described as tall. Maybe as they are wrapped up in layers of heavy clothing they appear as shorter?