(http://i43.tinypic.com/2vslqfr.jpg)
http://i43.tinypic.com/9gj828.jpg
Hey guys, yes, the first is Ruesswig, and I happen own and have scanned and blogged the issue. A gorgeous pulp.
http://darwinscans.blogspot.com/2009/05/frontier-may-1926.html
As for the second, another beautiful cover, the fictionmags index (an amazing resource for certain) lists it as A.H. Bittner, an artist I've never heard of and which the signature on the page doesn't necessarily indicate. I'm assuming this credit was taken from the contents page and that I'm blowing smoke, but I'm not so sure about that assignation. Cimm has this one - hope he doesn't mind me sharing the image and perhaps he'd take a look at his copy to double check the artist credit if he sees this ;)
(http://i35.tinypic.com/jhg3th.jpg)http://i33.tinypic.com/2u95yxc.jpg
and a close-up of the sig.
(http://i34.tinypic.com/atmd0y.jpg)
Lol, I thought that credit for the May 1927 issue might be fishy.
I'm pretty sure the artist is H.C. Murphy. Here's his signature:
(http://i37.tinypic.com/29z38k5.jpg)and the sig again from above, I'm not quite sure how these will line up until I see them posted here...
(http://i34.tinypic.com/atmd0y.jpg)A quick look at his cover credits on Fictionmags shows that he was very active in this time period and that he did in fact do at least one other cover for Frontier Stories as well as covers for many other Fiction House magazines. I happen to have a couple pulps in my collection with covers by Mr. Murphy in a similar color scheme, so here are the cover images:
Adventure, May 20 1924
(http://i34.tinypic.com/wsv22q.jpg)http://i34.tinypic.com/16hw75s.jpg
Sea Stories, August 1929
(http://i34.tinypic.com/1q0k7r.jpg)http://i37.tinypic.com/r9h4pv.jpg
The second one is scanned and available here:
http://www.mediafire.com/download.php?djwlm22zzmo
So perhaps the sun has set on this particular mystery ;)