Sunless Sea: Zubmariner Edition

A liaison from one of Fallen London's Universities, the Alarming Scholar is an enthusiastic collector of various curiosities. A Zee Captain such as yourself can turn in a few of these trinkets to him (or is it her?) for a fair price.

For the achievement, you'll need to turn in around 4-5 dozen items which are acquired at various intervals during your adventures. However, if you have the cash, you can simply buy several stacks to put you over the top. The best options are:

Lamentable Relic: 10x echos at Scrimshander in the Sea of Lilles (the cheapest option if you have a Zub).
Ambiguous Eolith: 35x echos at Mount Palmerston (the cheapest option without a Zub).
Outlandish Artefact: 150x Echos at Khan's Shadow (pricey, but, depending on your map, somewhat easy to reach).