Dispatches from behind the scenes of the history I write
| Platform |  | Pricing | Freemium | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 73 | Founded | 2 years ago | Last Issue | 8 days ago |
| Active | |||||
Read this Newsletter
helencastor.substack.comLatest Issues
Champion at the Tilt, Master of the Leash
Sir Henry Lee: a man out of time?
This is my favourite painting in the National Portrait Gallery in London.
The Mildmay Identity
In which I find myself on a mission: from a London train to Elizabeth I's Chancellor of the Exchequer
‘Why’s it called the Mildmay Line?’ asked my Canadian husband one evening last week as we stood in a mercifully air-conditioned train car...
Building Notre-Dame #4
6 January 2026. Dan Jones is the only person in the world who would send me a present for Richard II’s 659th birthday. What a friend. What a present.
It’s too good not to share.
The H Files by Helen Castor is a reader-supported publicatio...
The Art of the Deal
Richard II enters the Hundred Years War
Historians have to listen hard to their sources. Often, that means searching for nuance and subtext. Always, it means understanding context. Sometimes, it means hearing what’s actually been said.
Digging up kings (and queens) #6
Katherine Parr at Sudeley Castle
Now I come to think of it, the case of Katherine Parr should have been the first of this whole project, because she’s where it all started.
Audience Metrics
Subscribers, engagement, traffic and sponsorship for The H Files by Helen Castor.
| Subscribers | Engagement | 78 | Monthly Web Visits | ||
|---|---|---|---|---|---|
| Accepts Sponsors | Estimated Cost per Ad | ||||
Chart Rankings
How this newsletter ranks in the official Substack charts.
| #139 | |
| #68 |
Authors
The writers behind this newsletter.
Historian, writer, broadcaster: Blood & Roses, She-Wolves, Joan of Arc, Elizabeth I, The Eagle and the Hart
Frequently Asked Questions
How can I access the email archive for The H Files by Helen Castor?
You can find recent issues that have been published by The H Files by Helen Castor on Reletter by scrolling up to where it says Latest Issues. Tap on the link for any of the most recent emails or hit More Issues to see older ones.
How many subscribers does The H Files by Helen Castor have?
To see how many people subscribe to The H Files by Helen Castor, simply upgrade your Reletter account. We provide readership numbers and lots of other stats for this newsletter so you can decide if it's worth reaching out to.
How can I advertise in The H Files by Helen Castor?
Newsletter advertising can be extremely effective when it's done right. Before you pitch The H Files by Helen Castor as a potential sponsor or partner, make sure that you've done your research and checked its newsletter stats with Reletter.
Then, personalize one of our winning pitching templates and send it to the right person using the contact info provided.
How much does it cost to sponsor a publication like The H Files by Helen Castor?
Newsletter ad rates (or CPM) vary depending on many factors, including industry, number of subscribers, open rate, ad placement and more.
To find out how much an ad will cost, contact The H Files by Helen Castor using the contact information provided and ask for a copy of their media kit.
How can I find newsletters related to The H Files by Helen Castor?
Scroll up to where it says Related Newsletters to see other publications like The H Files by Helen Castor. You can also search our email newsletter directory to discover other newsletters that cover the topics you're interested in.
How do I contact The H Files by Helen Castor?
Reletter provides this newsletter's website URL above, where you will often find their contact information. We also provide links to associated social media accounts and pitching templates so you can reach out fast.