In 1835 Christopher
Costigan rowed from Tiberias on the Sea of Galilee to Beth Shean, then
traveled overland to the Dead Sea.
Thomas Howard Molyneux, a British lieutenant, rowed
down the Jordan from Tiberias with three friends in 1847. After many
clashes with unfriendly Bedouins they reached the Dead Sea.
William Francis Lynch, and American naval lieutenant,
and thirteen men went down the Jordan in two boats, one of iron and
one of copper, in 1848. They mapped the Jordan River and determined
that the Dead Sea was 1300 feet below the level of the Mediterranean
Sea. The map on the middle stamp is by Lynch.
During 1868 John MacGregor sailed his canoe, the Rob
Roy, on Lake Hula, the Sea of Galilee and the Kishon River. He was
taken prisoner by Bedouins on Lake Hula and later escaped. He mapped
the lake and the Sea of Galilee. His canoe appears on the left-hand
stamp on the sheet, and also on the lower margin.