The country around the Blackwater is flat, and the land slides into the sea and river with so slight an incline, that a good extent of debatable ground exists, which may be reckoned as belonging to both. Vast marshes are found occasionally flooded, covered with the wild lavender, and in June flushed with the seathrift. They nourish a coarse grass, and a bastard samphire. These marshes are threaded, cobweb fashion, by myriads of lines of water and mud that intercommunicate. Woe to the man who either stumbles into, or in jumping falls into, one of these breaks in the surface of land. He sinks to his waist in mud. At certain times, when no high tides are expected, sheep are driven upon these marshes and thrive. They manage to leap the runnels, and the shepherd is aware when danger threatens, and they must be driven off.

Nearer the mainland are dykes thrown up, none know when, to reclaim certain tracts of soil, and on the land side are invariably stagnant ditches, where mosquitoes breed in myriads. Further up grow oak trees, and in summer to these the mosquitoes betake themselves in swarms, and may be seen in the evening swaying in such dense clouds above the trees that these latter seem to be on fire and smoking. Major Donelly and I leisurely paddled about, running into creeks, leaving our boat, identifying our position on the map, and marking in the position of such red hills or their traces as we lighted on.

Major Donelly and I pretty well explored the left bank up to a certain point, when he proposed that we should push across to the other.

"I should advise doing thoroughly the upper reach of the Blackwater," said he, "and we shall then have completed one section."

"All right," I responded, and we turned the boat's head to cross. Unhappily, we had not calculated that the estuary was full of mudbanks. Moreover, the tide was ebbing, and before very long we grounded.

"Confound it!" said the major, "we are on a mudbank. What a fix we are in."

We laboured with the oars to thrust off, but could touch no solid ground, to obtain purchase sufficient for our purpose.

Then said Donelly: "The only thing to be done is for one of us to step onto the bank and thrust the boat off. I will do that. I have on an old shabby pair of trousers that don't matter."

"No, indeed, you shall not. I will go," and at the word I sprang overboard. But the major had jumped simultaneously, and simultaneously we sank in the horrible slime. It had the consistency of spinach. I do not mean such as English cooks send us to table, half-mashed and often gritty, but the spinach as served at a French table d'hôte, that has been pulped through a fine hair sieve. And what is more, it apparently had no bottom. For aught I know it might go down a mile in depth towards the centre of the globe, and it stank abominably. We both clung to the sides of the boat to save ourselves from sinking altogether.

There we were, one on each side, clinging to the bulwarks and looking at one another. For a moment or two neither spoke. Donelly was the first to recover his presence of mind, and after wiping his mouth on the gunwale from the mud that had squirted over it, he said: "Can you get out?"