Sorry it’s taken me so long to get back to you. Not heard anything about Crowley on the Eiger, but i’ll do a little research.
I suspect he may not have paid it too much attention. The Eiger only came to prominence when attempts began to climb its north face in the 1930s. He may well have climbed the Monch, which was probably more famous during his climbing career.
…this podcast, aside from the Napoleonic thrust, also details a catastrophic ascent of the Matterhorn in 1865. Complete with the lurid details of this, a quick summary of other tragic expeditions within several decades after is provided. No, AC’s ill-fated one is not included (putting it into perspective/ignorance?) yet the material is valuable in giving an insight towards the way AC may have seen this activity prior to his own personal adventures.