I am still trying to find the family after Henry's passing, hoping to find Ernest's birthplace.
Again, you may already know this, but
Sailing on board the Cedric, arriving 6 November 1910, was
Joseph Spark, age 24, Boilermaker?, last permanent residence Sth Shields, final destination Phoenix, Ariz. Born Sth Shields
Going to Father, John Spark, Ray Central? Copper? Mining Co, Ray, Arizona
Sailing on board the California, arriving 26 September 1910, was
John J Spark, age 53, Engineman?, last permanent residence Sth Shields, final destination Ray, Ariz. Born Newcastle
Going to "Visit?" Son in law, Henry Rowden, Ray Central Copper Mine Co., Ray Ariz
Update: A bit about the Copper Mine:
http://tucson.com/news/local/mine-tales-ray-mining-district-has-history-of-more-than/article_5560fe20-f4c4-559f-8298-1c8be0b75c77.htmlThere are images of the area online