○○○ bubonic ⪢⪢
￫ quarantine
1717#20583 SIBLINGS CHILDREN 20583

○○○ Christoph Grienberger ⪢⪢
1717#15831 SIBLINGS CHILDREN 15831

○○○ Francois Viete ⪢⪢
1717#14382 SIBLINGS CHILDREN 14382

Pillow English Listening

○○○ Ludolph van Ceulen ⪢⪢
￫ quintillion, quadrillion, trillion
1717#14755 SIBLINGS CHILDREN 14755

• π
#math
1717#13421 SIBLINGS CHILDREN 13421