_Rev._ COS.V. P.P. S.P.Q.R. OPTIMO PRINC. [Illustration] 46. The same as last. [Illustration] 47. Same as last. Seated figure, the right hand extended, holding a Victory. [Illustration] 48. _Obv._ IMP. CAESAR TRAIAN. HADRIANVS AVG. _Rev._ P.M. TR.P. COS. III. [Illustration] 49. _Obv._ Same as last. _Exergue._ FEL. P.R. (doubtful.) _Rev._ P.M. TR.P. COS. III. [Illustration] 50. _Obv._ IMP. CAESAR TRAIAN. HADRIANVS AVG. _Rev._ P.M.TR.P. COS. III. PIE—TAS, in the field. 51. _Obv._ Same as last. _Rev._ P.M.TR.P. COS. III. CONSULAR AND OTHERS. [Illustration] [Illustration] [Illustration] This coin symbolizes the peace concluded between the Roman general Scaurus and the Arabian monarch Aretas. [Illustration] [Illustration] [Illustration] [Illustration] [Illustration] MINERALS AND METALS. In nearly all the stations of the line, the ashes of mineral fuel have been found; in some, a store of unconsumed coal has been met with, which, though intended to give warmth to the primeval occupants of the isthmus, has been burnt in the grates of the modern English. In several places the source whence the mineral was procured can be pointed out; but the most extensive workings that I have heard of, are in the neighbourhood of Grindon Lough, near Sewingshields. Not long ago, a shaft was sunk, with the view of procuring the coal which was supposed to be below the surface; the projector soon found, that though coal had been there, it was all removed. The ancient workings stretched beneath the bed of the lake. [Sidenote: MINING OPERATIONS.] In Allendale and Alston Moor, numerous masses of ancient scoriæ have been found, which must have resulted from the reduction of lead from its ore. In the station of Corchester, portions of lead pipe have been found; it is an inch and a half in diameter, and has been formed by bending round a flat strip of the metal, and soldering the joint.