@greenhalgh_j
I have a database and written notes on the Volunteers and the 1/5th. This contains a list of soldiers, Officers and thier service details. It also contains promotions and who replaced whom and when. I also have copies of the orders, articles on camps and changes to the unit starting from 1859 and finishing at 1920. The information is from local regional, national and military newspapers and all of the military documents avaiilable on Ancestry and FindMyPast. I also have a complete list of Volunteer Long Service Medals and TFEM medals from the mid 1880's up to 1914.
From my database, If Thomas Greenhalgh enlisted in the Australian Force in 1915, and two years previously he was with the 1/5th Manchesters, his service number will fall between 1490 and 1750. I have 1517 as enlsiting on 13th Feb 1913 and 1743 enlisted on 23rd Dec 1913. Eccles was F Company. It was based at Patricroft Drill Hall (now demolished). Before 1908, G & K Companies were based here.
I do not have a Thomas Greenhalgh in this database, so he is probably one of my 'missing numbers'. However, there is a William Greenhalgh who joined the Leigh detachment. This was H company. If I come across any information I'll let you know.