There is no direct evidence of Clara in Prague in 1751. However, newspapers reported that Douwe Mout expected to travel from Vienna northwards to Prague and Frankfurt (source 6201; source 6202).
Distance Vienna to Prague is 335 km
Source 6201. Wienerisches Diarium, 29 May 1751
Wienerisches Diarium 1751. Rhinoceros in Vienna. Wienerisches Diarium No. 43, 1751 May 29.
Original text (German)
Avertissement. Rhinoceros . . Es wird aber nicht über 8. Tage hier verbleiben, sondern über Prag auf die Frankforter Messe und dann noch vor dem Winter nach England geführt werden.
English translation
Avertissement. Rhinoceros . . . However, it will not remain here for more than eight days, but will be taken via Prague to the Frankfurt Fair and then to England before winter.
Source 6202. Opregte Groninger Courant, 15 June 1751
Douwe Mout 1751. Opregte Groninger courant no. 48, 1751 June 15, p. 2.
Original text (Dutch)
Van Weenen berigt word . . . Rhinoceros. . . . Voorts dat de Meester van intentie was, na een kort verblyf in die Stad, over Praag, Duytsland en Nederland na Engeland over te steeken.
English translation
Furthermore, that the Master intended, after a short stay in that City, to cross over Prague, Germany and the Netherlands to England.
