Cover for my book on paternal genealogy

I’ll soon be needing a cover image for They Sought the Last of Lands, which describes the paternal dimension of my family history. Here’s a possible maquette:

For the moment, I’m not convinced that this maquette is good. My choice of the theme of wild horses in the Australian Outback (an image that belongs to Les Hiddins and ABC Books) evokes, above all, my grandfather’s childhood dream of leaving London and finding freedom in the Australian bush. Meanwhile, I've contacted ABC Books in the hope of obtaining a high-resolution file of this image.

We’ll see. All suggestions are welcomed. I plan to bring out this title at Gamone Press as soon as possible, shortly after the publication of A Little Bit of Irish.

POSTSCRIPT: I'm aware that a talented graphics artist (highly paid) would solve rapidly my cover-design challenge. But a professional operation of that kind would propulse me out of the self-publishing field, and disrupt the whole friendly common-sense idea of producing and distributing a family-history document without falling into the trap of paying a fortune to vanity-press printers. Please accept my amateurism!