From Fallen London Wiki
For most people Intel can be farmed in the Khanate through <a href="/wiki/Intercept_a_cablegram" title="Intercept a cablegram">Intercept a cablegram</a> at a rate of 4 actions a pop.
Alternatively it can be sourced through Tracklayer City shenanigans or via Balmoral Larceny through <a href="/wiki/Ambush_a_courier" title="Ambush a courier">Ambush a courier</a> with Casing sourced from Parabola.