I rather doubt if this will be usable, either. I'm not sure where you're seeing a publication date, but I don't find it. There's no publication date given on the archive page (which, I believe, we don't always trust anyway), and I don't see one within the ebook, either. The only instance of 1923 I can see is at the end of the foreword, which General Booth dates as "London, July, 1923." But that's not a publication date, though.
There is a website given at the back of the book: "For more eBooks visit www.LWBC.co.uk
" I visited this site and found the following disclaimer:
Whilst Living Word Bible Church makes every attempt to ensure these publications are in the public domain and thus free from copyright, it is your responsibility to check the laws in your own country prior to downloading them. Please inform us directly if you, as the author or publisher of a listed book, feel that copyright has been broken and we will quickly remove it. Contact us here.
Living Word Bible Church offers these books in good faith. We do not and never will charge for these volumes.