Biography

Mentioned in 18710908WHS_WSJ
WHS writes
"Unhappily the king and court and cabinet are all aboard, spending their summer vacations."

According to Britannica: 
"William I, German in full Wilhelm Friedrich Ludwig (born March 22, 1797, Berlin—died March 9, 1888, Berlin), German emperor from 1871, as well as king of Prussia from 1861, a sovereign whose conscientiousness and self-restraint fitted him for collaboration with stronger statesmen in raising his monarchy and the house of Hohenzollern to predominance in Germany."
Emperor until his death in 1888