Richard Hough turns out to be a naval historian who, in the words of his daughter, "also wrote a few of the old potboilers because he had to keep us all going". And if you look at his Wikipedia entry you will see he wrote those books under the name Bruce Carter.
"Peril on the Iron Road" is illustrated by Charlotte Hough, which would have been a much bigger clue to Bruce Carter's identity if I had thought to follow it up. And through the book I discovered a remarkable story about her. At the ago of 60 she was imprisoned for helping a desperately ill friend commit suicide.
Deborah Moggach speaks about this in a Daily Telegraph interview from 2010:
Last night, Moggach talked publicly about the ensuing family scandal for the first time for 25 years. The Old Bailey trial, the gossip, the furore. The clanging of doors as her mother, sentenced to nine months for attempted murder, "disappeared into the underworld, like Orpheus." Then the relentless bullying by inmates.
She believes her mother acted bravely, out of deep compassion, and that the mental torment she suffered during her incarceration – revealed in a sequence of mordant letters – points up the inhumanity of the law, then as now, towards so-called mercy killings.It is hard to disagree with that.