In Search of... Aliens

A reader named Darell writes:

When I was young, before I started collecting comics (I collected and traded them between 1960 and 1966) I used to read my uncle's. This would have been in the very early sixties, 1961 to 63 probably (he was about 16).

I remember him having many comics that had a serial for a few pages in the back of (main) comic book I’m not sure who the publisher was, could have been Charlton, DC, I don’t remember, although it was before Marvel and Gold Key.

In any case, in the serial I’m hoping to chase down, the main character(s) for what i can remember were in contact with another race of advanced men who had tall heads, sort of like an Egyptian pharaohs’ crown and I think their bodies were colored, like light blue or green or? I can’t remember too much. I remember these people were found behind a wall or partition, almost like another dimension and our main characters were interacting with them somehow when they came in contact with them. Sorry it’s not much, but does it ring any bells?

My uncle only had comics like war comics, Magnus Robot Fighter, DC, Charlton, was there an AC?

Comments by Pat: I suggested The Aliens from Magnus, Robot Fighter, but after reading my post on them, Darell responded that while he remembered that series, it was not the one he had in mind.  Any ideas, fellow Silver Age fans?  I don't think it could be Marvel, because it doesn't fit the serial requirement.  Despite what Darell says, I would not rule out Gold Key; they started publishing in 1962, so they would not be entirely outside of the 1961-63 timeframe he mentions.  I don't think it could be ACG; they didn't have any serials that I can remember in any of their science-fiction books.  Charlton, or Dell, maybe?