Cob: Internal lintels?

[Waiting4 TheDay]

Hello all,

Just when I thought I had it all figured out....  I'm wanting to put a large 
window (5' long x 4' tall) in a very small round building.  While the window 
won't be able to open, I'm not comfortable with putting something that large 
into the wall without a lintel of some sort, particularly since the top of 
the window will be about 2' or less from the top of the wall, which is 
load-bearing.  Here's the question:  I'd rather not have a lintel showing on 
either surface of the wall, so is it possible to have a fairly sturdy lintel 
above the window but encased entirely within the wall?  Say a large log or 
pair of 4x4 nailed together?

Thanks,

Chuck

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