The Victorian Indexer: On the First Personal Knowledge Managers

We imagine our digital tools as uniquely modern solutions to an age-old problem: how to hold onto what we learn. But the struggle, and the ingenuity applied to it, is far older than our apps. Long before the hyperlink, there was the humble index card, and its most devoted master was a figure we might now recognize as the original PKM obsessive: the Victorian commonplacer.

These were men and women, often scholars or simply voracious readers, who maintained ‘commonplace books’—physical repositories for quotes, ideas, and observations harvested from their reading. But the true innovators went a step further. They didn’t just transcribe; they systematized. They became indexers.

The Machinery of the Mind

Consider the method of English philosopher John Locke. He didn’t just jot notes down willy-nilly. He developed a complex, alphanumeric indexing system for his commonplace book, detailed in a 1686 pamphlet he sent to a friend. His method involved categorizing entries under broad headings, then assigning each a unique ‘vowel-based’ page reference. This created a manually operated, paper-based search engine. To find a note on ‘Courage,’ one would consult the index, which would point not to a page, but to a specific letter-code that corresponded to the precise location of the entry.

This wasn’t idle fussiness; it was a practical response to information overload. The Enlightenment and the subsequent explosion of printed material created a sense of intellectual urgency. How could one possibly read everything, let alone remember it? The answer was to externalize memory, to build a second mind outside the body.

Their tools were scissors, ink, and paper. Their ‘feeds’ were books, journals, and letters. Their ‘sync’ was the laborious task of copying and recopying by hand. The goal, however, is hauntingly familiar: to create a web of knowledge so dense and interlinked that new connections would emerge from the system itself. They sought not just to store information, but to generate new thought from its friction.

There’s a lesson here for us, surrounded by infinitely more powerful digital tools. The Victorians understood that the system itself is not the point; it is a means to an end. The value lies not in the perfection of the taxonomy, but in the act of engagement—the physical writing, the deliberate sorting, the intentional re-reading. Their cumbersome methods forced a slow, thoughtful interaction with each idea. In our age of effortless ‘clip and forget,’ we risk amassing a quarry of digital stone without ever building anything with it.

We stand on the shoulders of these analog giants. Our note-taking apps, with their backlinks and tags, are the direct descendants of Locke’s intricate indexes. We are still chasing the same dream: to offload the burden of memory and forge a clearing in the wilderness of knowledge. Perhaps the oldest tool in personal knowledge management isn’t an app or a device, but simply the patient, deliberate act of paying attention.

Notes & further reading

A few pages I came back to while writing this: