"With Mrs. Ř. we formed an inseparable trinity for 50 years, we were three lifelong soul mates. For the last two years, Mrs. Ř. was seriously ill, and because she had no relatives, we went through the whole situation with her and accompanied her to the last moments," the friends, who identified themselves as J.S. in Prague 9 and D.C. in Prague 3, wrote to Prague Zoo's director.