A large (215-295 centimeters) map drawn in iron gall ink and watercolor on paper and mounted on linen was damaged, especially the upper part. The adhesion and the paper had become brittle, and many pieces had already been lost. The paper had turned brownish, and paper and linen were torn in some places. These tears had been repaired in the past with wide strips of thin paper that had become brown and brittle. The conventional method in dealing with large paper objects that have been composed of several sheets is to detach the sheets preferably (but alas not always) at the original seams. The old linen is practically always considered of no (art historical) value and is then discarded. This procedure is considered reprehensible by the authors, who tried to find a method of restoration which allowed large maps to be treated as-a-whole and made it possible to reuse the old linen after repairing it. After protecting the colors with a 2% solution of Klucel in ethyl alcohol (which can be expected to be effective in a temperature between 35° to 40° C), the map was immcrsed in a warm bath and removed again after approximately four minutes. Much of the brown discoloration was lost, the strips had floated off, the adhesion had loosened and the colors were unharmed. The map was taken out of the water with the help of a long round stick which was inserted under the middle of the map and slowly lifted (a Japanese method). The map was put upside down on a table and Japanese (Tengujo) paper was pasted to the reverse side. The linen was repaired, and a 15 centimeter wide margin of cotton was stitched to the edges. The linen was wetted and stapeled through the margin onto a board. While still wet, the map was mounted onto the pasted linen. The object was allowed to dry slowly and was dry and flat after two days. The restorationhad taken only four and a half days.