मन्त्र रामायण (नीलकण्ठ चतुर्धर - पं. रामकुमार राय सविस्तार हिन्दी व्याख्या सटीक)

-like shape... wait, is it व? द्?
Wait, compare it to द्द: in Devanagari द्द is a द with another द below it.
Compare it to दृ: द with a ृ hook below.
Here, it has a top part, and a bottom part that hooks down and left.
Wait, is it चिदृहते?
Wait, could the letter be चि + द + द?
Look at चिदृहते: चि + दृ + ह + ते.
Wait, why does it look like चिद्दहते? Look at the middle:
There is a circle/loop.
Wait, let's look at द्द in आराद्दूरात् (line 14):
Look at line 14: आराद्दूरात्!
Look at द्दू in आराद्दूरात्:
It has a द on top, and a दू below it!
Now look at line 4: does it look like द्द?
In line 4, it has a vertical, a curve, and below it... wait!
Look at line 4:
चि
then a letter that has a top, a middle, a bottom:
Wait, could