Premise: Leberecht Maass (or Maaß) (24 November 1863 – 28 August 1914) was the "Konteradmiral" who commanded the German naval forces at the first Battle of Heligoland Bight. He lost his life when his flagship, the light cruiser SMS "Cöln" , was sunk by British battlecruisers commanded by Vice Admiral David Beatty.
Hypothesis: Leberecht Maass was born in the summer.