Was doing some cyphering and the time between 2 of the recent crumbs was 7:53. I looked at crumb 753 and it was around the post of a picture of Ruth Bader in Hanoi. Above it says OP. This can mean "Original Poster" or "Operation". So I was looking into that and remembered Trump/Q mentioned the ambassadors need to be looked at. https://en.wikipedia.org/wiki/Ted_Osius Ambassador to Vietnam. Obama appointee. Maybe he is a singer. American University in Cairo for a year, Johns Hopkins, Harvard. IMO, the ambassador is the usual, "C_A". In addition to English, Osius speaks Vietnamese, French and Italian, as well as a bit of Arabic, Hindi, Thai, Japanese, and Indonesian. Merlin Operating System, OPERATING SYSTEM, INTERFACE GUIDE, THE CORVUS CONCEPT Is the Operation Merlin.

https://en.wikipedia.org/wiki/Ted_Osius

http://www.bitsavers.org/pdf/corvus/Corvus_Concept/manuals/7100-03290_OSinterfaceGuide.pdf