I have a copy of ‘Gospel Hymns for Children’, with the Preface dated 1898, but published by C. A. Hammond (216 hymns + doxology). It was advertised in “A Words of Help” 1950 as “just reprinted”. The preface of 1898 says that “some of those engaged in the work amongst the young met together, and after going through a large number of hymns, compiled this selection.” It seems that there was no single compiler. The preface also says that “the collection is based on ‘Choice Hymns,’ which this book is intended to supersede”. I presume that this is “Choice Hymns for Sunday Schools”. The second edition of this book “has recently been compiled by a number of Teachers in different Sunday Schools, to meet the need of large Schools.”
As to the German hymn books of “Raven”, “Glanton” and “Taylor” used in the assembly I made a list years ago for the English Wikipedia, see here: https://en.wikipedia.org/wiki/Little_Flock_hymnbook and scroll to “German editions” at the end of the article.
The hymn book ‘Heils= und Loblieder’ is a German hymn book of “Glanton” but probably used more in the family etc. The fact that it was a “Glanton” hymn book is evident from the Name “Max Staude” in Schmölln. Staude was a leading brother of rhe German "Glanton's" around 1930 but unfortunately embraced Universalism around 1935. Staude also published a German magazine of “Glanton” (“Der Dienst des Wortes”) which was taken over in 1935 by Hugo Adrian, who later joined the Taylor group.
Martin