via Daily Motion:
Time Out calls Slaughter's performance "oddly chilling". Cult Reviews concludes:
it’s a great joy to watch the talent of two artists at their best moment, and one can only wonder what would had happened with their careers if they had been hired by Universal or Columbia. Just like Boris Karloff is American cinema’s icon for the horror genre, I see no problem with considering Slaughter as his equal in British cinema. Classy, grim, sinister and even fun, “The Face at the Window” is definitely the proof that George King was a true artist of the genre, and Tod Slaughter the British master of Victorian shock and horror.