Can anyone help with markings on asian scroll

If anyone can translate or help with information it is appreciated as always

 

Beautiful, Crim. The subject is Guanyin, in case you're wondering.
I hope @JayBee or @Couch Potato Wannabe can translate fro you.

 

The round mark is in ancient Chinese Seal Script.
These are literal direct translations of the characters only into modern day characters...
古 = ancient/old
而 = (conjunction) and, while, but, yet, as well as
子 = (noun) child, son, seed, first earthly branch, small thing
希 = (verb) hope, (adjectives) rare, infrequent
"Gu Xi Tian Zi"
Translated into a phrase means "A son of heaven like no other"
or "A son of heaven as rarely seen since antiquity"

I can't really see the large rectangular mark nor the square mark clearly enough to make out all the characters there. I see a couple, though am taking them out of context here.
Maybe on the large rectangle these....
二 = two
堂 = Hall

But it might help to have an even closer, sharper photo of these taken.

 

Thank you @Couch Potato Wannabe
Someone also translated to
Suitable for assessment in the studio of three rarities
Guxi tianzi Ancient rare (70 years) emperor seal presented to Qianlong Emperor on his 70th birthday

 

Large Rectangular Mark, bottom left character 璽 = Royal Seal, Imperial Seal, Ruler's Seal