Irwin, James Purser (SN 5035) James enlisted on January 20 1916 at the age of 20. He was a warehouseman. James served in France but Returned to Australia on August 27, 1917 and was medically discharged in January 1918 - he suffered from Psoriasis. In 1918 he married Daphne Idina (known as Ida) Mickle and they are listed in the Electoral Rolls as living at Brighton for twenty years and then various other Melbourne suburbs, he was a Clerk. James died in 1986. James' dairy recording his experiences in the War is held at the State Library of New South Wales and can be accessed here. He donated the diary to the Library in 1920. The Trustees of the Mitchell Library (as the State Library of N.S.W is known) started the Soldiers' Diaries Collection in 1918 - we are fortunate that they had the foresight to start this collection when many soldiers were still in possession of their diaries..
Irwin, Horace Mark (SN 967) Horace enlisted on February 9, 1915 at the age of 18 years 8 months. He was an Orchardist. David Returned to Australia on July 8, 1919. After the War, Horace married Mina Slater in 1922 and they lived in St Kilda and other suburbs. Horace was a tramways employee, like his father, and died in 1972.
Irwin, Walter Gray (SN 968) Walter enlisted on March 3 1915 at the age of 18 years and 7 months. He was a farmer. Walter served at Gallipoli and Returned to Australia February 8, 1916 and was discharged on medical grounds in the July of the same year. He suffered from 'Neurasthenia' which is now described as an obsolete term to cover lassitude, inability to concentrate, mental and or physical fatigue. Walter married Lena Petersen in 1918 and died in 1968. Walter and Lena lived in Bendigo and Tatura then in the mid 1930s moved back to Melbourne to Oakleigh. Walter was a 'traveller' or salesman.
I can't quite work out the ages of Horace and Walter - according to the ages on their enlistment papers they were born two months apart which is clearly unlikely and the Index to the Births, Deaths and Marriages says that Walter was born 1897 and Mark in 1896, so there was possibly a mistake on the enlistment papers - if anyone knows the answer to this, I would love to find out.