Pte. Ellerker's family used to have two grocers shops at 21 and 35 John St. until just before the outbreak of war.

His family received a letter from the Chaplain at Walter's hospital. It read "I sent you a letter on November 30th to tell you your son was wounded. I am very sorry to tell you that he passed peacefully away the same night, at 9.30pm. He wished me to say 'Slightly Wounded. Getting on well. Don't worry. Treated well.' This was in the morning. No further message. He became unconscious. It is particularly hard lines that he and others should be wounded whilst at a casualty clearing station in ... We laid his body to rest in a British Military Cemetery."

Both Walter and his brother Hebert were members of St. Oswald's church choir.

He is mentioned in the Scarborough Mercury (Filey News) on 14th December 1917.