Sense Sonnet - Chiller

White House Killer

William Harrison and James Polk
And Zachary Taylor all died.
Killer in the White House? - no joke!
An outside killer got inside,
And made these three Presidents ill.
Water pumped from a tainted spring
Carried  nasty germs that could kill,
Once in the body infecting.
Susceptible, these Presidents
Were thought to have gastric disease.
No one knew of the evidence
Of water in lethal degrees.

In time the tainted spring was gone,
And life in the White House went on.