On the 27th of May 2007 I had the opportunity to go to Paris, where I visited the Necker Institute of the Université Descartes. What an easy journey! I needed my passport once for an air ticket and, after a few hours flying, paid my dinner in a parisian restaurant with euro’s.
When La Condamine and Maldonado arrived in Para (Belem), the latter could go on a Portugese ship to Lisboa, where he arrived after 3 months in February 1744. Because of the political situation in Europe, La Condamine could not join him and had to find a crew of rowers that would bring him to Cayenne, where he arrived on 26 February 1744.
(From his journal one of the rare emotional remarks: “Je m’embarquai enfin la nuit du 29 au 30 Décembre 1743. Neuf ans d’absence de ma patrie, & l’espoir de trouver bien-tôt des nouvelles de ma famille & de mes amis, me donnoient la même impatience d’arriver a Cayenne, que si cette colonie eût été la France même.” )
When, via Paramaribo, he finally arrived in Amsterdam he had to wait 4 months before he obtained the necessary passport papers for travelling to Paris!
In Paris I visited the Bibliothèque de l’Observatoire de Paris (61, avenue de l’Observatoire) founded in 1667! Saying that I had been travelling in the footsteps of La Condamine and that I wanted to see his journals was sufficient to be admitted and to obtain the original book of the “Journal du Voyage fait par ordre du Roi....” (Imprimerie royale, Paris, 1751).
Copy of the front page of the book:
"Journal du Voyage fait par ordre du Roi, A l'Equateur, servant d'Introduction Historique a la Mesure des Trois Premiers Degrees du Meridien. Par M. De La Condamine.
(Oppofuit Natura Alpemque nivemque. Juven. Sat. X.)
A Paris, de l'Imprimerie Royale.
M. DCCLI."
With the help of a visiting astronomer (Madame Simone Dumont, Meudon; see photograph) I also obtained a volume of the “Histoire de l’Académie Royale des Sciences”, Année M.DCCXLV. A Paris de l’imprimerie royale volume M.DCCXLIX (cote 2163), with on page 391 an article by La Condamine entitled “Relation abrégée d’un voyage fait dans l’interieur de l’Amérique méridionale depuis la côte de la mer du Sud jusqu'au côtes du Brésil et de la Guyane, en descendant la rivière des Amazones, lue à l'assemblée publique de l'Académie des sciences, le 28 avril 1745, par M. de La Condamine”.
At its end (page 492) the article contained a drawing (Pl.IX) of the Marañon river between Sant Iago and Borja (see copy and an image of Google Earth), entitled: “Carte du detroit appellé Pongo de Mansériché dans Le Maragnon ou la Rivière des Amazones entre Sant-Iago et Borja où le lit du Fleuve se retrécit de 250 Toises à 25 Toises” , (i.e. from about 500 to 50 m). The drawing shows how the river flows between high banks and hills.
Comparison of the drawing made by La Condamine and the satelite image of Google Earth of the same region , Pongo de Manseriche (Peru)
(distance between Sant-Iago and Borja: ~4000 Toises or 8 km)