christian leitz has earlier tried, in vain, to solve the enigma of the senmut star map (just like joachim friedrich quack, 2.oct.2001, cf. above - in his way - also have tried).

Make this proper case.
Christian Leitz has earlier tried, in vain, to solve the enigma of the Senmut Star Map (just like Joachim Friedrich Quack, 2.Oct.2001, cf. above - in his way - also have tried).