Sealing Insights can be found at The Bone Gate, doesn't require a cycle. I can't navigate the wiki, but I did record the echoes for obtaining from and handing them in:

<a class="external free" href="https://www.fallenlondon.com/profile/Ann">https://www.fallenlondon.com/profile/Ann</a> N. Fortunate/37584077

<a class="external free" href="https://www.fallenlondon.com/profile/Ann">https://www.fallenlondon.com/profile/Ann</a> N. Fortunate/37584279