Anagrampage: Rats 'n' Tsar, Arts 'n' Star

“Who’ll Russia rid of rampant rats,” cried Yaroslav the First. 
“The Moskva’s not the Weser,” sigh'd his barons to their Tsar. 

“The German town of Hamelin with vermin nearly burst -- 

until they hired a piper, an extermination star,

which Roy-G-Biv-garb'd flautist plied his liquidation arts. 

But though a scourge of pests he purged, he pinch'd his patrons' hearts."

Anagrampage: East 'n' Teas, Eats 'n' Seat

Cathay lies east of Camden Town.
Sweet teas they pour lack cream or milk.
The Huangdi there eats bird's nest soup
and governs from a seat of silk.