Yes we definitely have a link. Alfred Barnard Jarvis was my father and Jessie (or Alma) was his sister. My father was also born in Victoria. I knew that Jessie had two sons who I knew as Jack and Noel. Jack was obviously a nickname. I know that there was a 'falling out' between Jack, Noel and my Dad very early in my life but I have no idea what it was about. After that we lost all contact. You are obviously related to Noel, going by your name?
Most of my genealogy information is on Ancestry under Jarvis Family Tree. I have a photograph of Roy, Jessie and Alfred with their mother which was taken when they were quite young, although Roy is in Military Uniform. There was a big age difference between Roy, Jessie and my Dad who was the baby of the family. There is also a beautiful photo of Grandma Jarvis (Ernestina Ada Elizabeth Ash). We also have a photograph (on Ancestry) of Peter Whitelaw in uniform. We also have information about his Unit. He was in the 9th Field Ambulance. I know that Ada and Arthur Jarvis were divorced and he remained in Victoria, but I know little of his life. I have located a bit more information about his mother and father who were William Jarvis and Emma Gerrard who came from South Australia.
I am very excited to get this information. Are you on Ancestry? If so I can forward you my Family Tree which has extensive research.
I started to change over to Wikitree but found it difficult to fill in all the information.
Look forward to hearing more from you.