BAXTER (George) and MACGREGOR (John). The ascent of Mont Blanc: a series of four views. London, 1855. 4 colour lithographs using the Baxter process, without margins, matted and ready for framing (size of images: 15 x 10 cm). The views show: 1) The glacier du Taconnay 2) Leaving the Grands Mulets 3) The steep and deep precipice of the Mur de la Côte 4) The summit. George Baxter (Lewes 1804 - London 1867) was an English engraver who invented a process for reproducing colour engravings that was somewhere between aquatint and lithography; this process ("lithotint") was quickly abandoned because of its cost, despite the quality of the results obtained, as shown by these views of the ascent of Mont Blanc. A rare set, in good condition, of these engravings from another provenance (not subject to import VAT).