After the work was completed in 1867 , he took a short trip to back to Germany , where he became acquainted with photography .
Hoeltzer was tasked by the British in Isfahan to run the telegraph center in this city .
After the work was completed in 1867 , Hoeltzer took a short trip to back to Germany , where Hoeltzer became acquainted with photography .
Hoeltzer was tasked by the British in Isfahan to run the telegraph center in this city .