Pierre-Auguste Lamy (?) - Les contes d'Hoffmann by Jacques Offenbach, Giulietta act.jpg
This appears to be by Pierre-Auguste Lamy (1827- c. 1880)  This would, obviously, be one of his last works. The signature resembles other signatures by him. See the other images in this set for other examples of the artist's signature. 

Restored by {{Creator:Adam Cuerden}}

Restoration included removing scratches, rotating to make the verticals and most of the horizontals straight, and adding in some paper to avoid excessive cropping because of the rotation, levels adjustments, and so on.
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Pierre Auguste Lamy (?) Les contes d'Hoffmann by Jacques Offenbach, Giulietta act, Illustration from the 1881 première of Jacques Offenbach's ''Les contes d'Hoffmann'', showing the Giulietta act. I'm not sure exactly when the Giulietta act premièred; it wasn't ready for the first production, but it was being performed by the end of 1881, apparently., Giuletta act, 1881
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1881年初演時のイラスト（ジュリエッタの幕）
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Pierre Auguste Lamy (?) Les contes d'Hoffmann by Jacques Offenbach, Giulietta act, Pierre-Auguste Lamy, Les Contes d'Hoffmann (Offenbach), Adam Cuerden's restorations
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Illustration of the first performance in 1881
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ピエール・オーギュスト・ラミージャック・オッフェンバック『ホフマンの苦悩』、ジュリエッタ・アクト、ジャック・オッフェンバックの「ホフマンの苦悩」の1881年初演時の図。初演時、はっきりとはわからないが、1881年の終わりまでに上演されていたようである。
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ピエール・オーギュスト・ラミージャック・オッフェンバック『ホフマンの生涯』、ジュリエッタ法、ピエール=オーギュスト・ラミー『ホフマンの伯爵夫人』、アダム・クエルデン『修復』
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offenbach bookdealer pierre conte obviously allied command atlantic actable excessively apparently rotatable unbelievably avoid incredibility incredibly anglicise by all means anglicism anglicization reinstatement abstinent from scratch straightness rotationally abstinence acquirable dilettante amateur wrestling incredible outburst enforceable act enforce salvage rotational warlock rotated prologue legislation scratcher enforced restore acquirer groundwork legislative act restatement talking picture by no means spaghetti adjustive convulsion adjustable amateurism wetness adjusted adjustment