to represent the probable boundaries of the cantons as these were applied in practice at the critical date. In consequence, unless we find abnormal deviations in relation to the texts or manifest lacunae in the information on the canton boundaries, and subject to the necessary caution where the hesitation of the map’s drafters is reflected in gaps in the line of crosses, these results should in principle serve as a guide to determine the course of the inter-colonial boundary in 1960.”351