In the books thrown out by my parents-in-law, I retrieved these pages. The book had no credits, but a couple of names are legible and I’ll leave you with the rest.
As Wikipedia says: Charles Edmund Brock (5 February 1870 – 28 February 1938) was a widely published English line artist and book illustrator, who signed his work C. E. Brock
I couldn’t find much to help identify Stavert J Cash except a reference on a genealogical website stating he could be Stavert Johnstone Cash (1884-). One interesting find was a Boy’s Own Paper from 1914 which ‘predicted’ the mobile phone:
Howard K. Elcock was most famous for his association with the drawings for Sherlock Holmes in the Strand Magazine
The signature on this piece is totally unknown to me, but is it ‘N. Sotheby Paberton’ or similar?