Nice medium-large format magazine; aimed at young people. Papers by A.T. Schofield, Robert McKilliam, J Denham Smith, J G Bellett etc. C.H. Spurgeon said of it "Answering to its title, this excellent serial is sure to benefit its readers; may they be as many as the stars!"
I know March 1916 was issue 339.
It was founded by Henry Pickering.
This page gives some information, though maybe partly mixed up with another magazine, http://www.victorianperiodicals.com/series3/single_sample.asp?id=127826
"A missionary paper for our young people".