I received my bottle of Whaleman's Sepia a few days ago, and I'm like a rabbit now - very hoppy!
This ink looks like reddish brown muddy sludge in the bottle. Not surprisingly it's a bit thick and dry, but its reputation as a nearly unusable ink is exaaaaaagerated. It behaves relatively well for me in a Pilot Petit1 and a preppy, both with fine nibs. If I pause for more than 10sec when writing the first stroke would be a bit hard, but that's it. I'm going to "tame" this bad boy with some decyl glucoside, a non-ionic surfactant similar to the surfactant in Photo-Flo. Will follow up with results. For now, hope you enjoy the review of the yet "wild" Whaleman's Sepia!