Both in the manuscript which we have just been describing and another of older date[298] is a picture of two persons seated. In both manuscripts one is called Euclid, in the older manuscript only is the other named, and designated as Hermann. According to Black’s description Euclid “uplifts a sphere with his right hand, and with his left holds a telescope through which he is observing the stars; towards whom ‘Hermannus,’ on the other side, holds forth a circular instrument hanging from his fingers, which is superscribed ‘Astrolabium.’” The picture in the other manuscript is similar, but in view of the fact that they were written in the thirteenth and fourteenth centuries, the rod along which, or tube through which ‘Euclid’ is squinting, can scarcely be regarded as a telescope without more definite proof of the invention of that instrument before the time of Galileo. Perhaps it is a _dioptra_[299] or spying-tube of the sort described by the ancients, Polybius and Hero, and used in surveying. But I mention the picture for the further reason that Clerval[300] asserted a connection between Hermann of Dalmatia, the twelfth century translator, and Bernard Silvester, affirming that Hermann sent Bernard his work on the uses of the astrolabe and that he really translated the _Experimentarius_ from the Arabic and sent it to Bernard who merely versified it. But we have already proved that it was Hermann the Lame of the eleventh century who wrote on the astrolabe and that he did so a century before Bernard Silvester. The aforesaid picture is clearly of him and not of Hermann the Dalmatian. And whether the “B” at whose request Hermann wrote on the astrolabe be meant for Berengarius or Bernard, it certainly cannot be meant for Bernard Silvester, who was not born yet. [Sidenote: Text of the _Experimentarius_.]