Unknown - Construction works of the Corinth Canal 1881/1882 - 3 pcs antique albumin photosphotos

3 pcs rare and unique albumin photos taken on the construction (building) works of the Corinth Canal. The Canal was built on the basis of the engineer work of Hungarian experts (István Türr, Béla Gerster). The photos were taken by one of the Hungarians working on the field.
The 3 photos shows the construction work from different perspectives (for example from the see).
Two of the photos are retouched with white paint (most probably they were used for press purpose and the retouch had been carried out by the printing house).