The castle diary of Useless
Useless is the network’s eraser-in-residence. This time it has been posted to the battlements with a notebook and a very small torch. Every fact in here has been checked by someone more qualified, i.e. anyone.

- Day 1
Castle Rushen’s walls are three feet thick. I am about one centimetre thick, and nobody gets through me either. Mostly because nobody tries. Manx National Heritage: Castle Rushen
- Day 2
There are 100 steps up to Castle Rushen’s flag tower. I counted them twice and got 99 and 101. Maths is not my department. Manx National Heritage: Access Guide for Castle Rushen (2026)
- Day 3
Castle Rushen’s gatehouse has murder holes and a toilet. I have one hole, from a compass. Please don’t ask. Manx National Heritage: Group visitor information for Castle Rushen
- Day 4
Castle Rushen’s clock had no face until about 1720. I have a face. It is drawn on in biro. Manx National Heritage: Castle Rushen’s medieval clock to undergo specialist conservation
- Day 5
Castle Rushen was the island’s prison for 100 years. I was in detention once, for ten minutes. It felt like 100 years. Manx National Heritage: Castle Rushen Assessment of Significance (2017), on Planning Portal IoM
- Day 6
“Traa dy liooar” means “time enough” in Manx. That is what I say when my homework is due tomorrow. Manx National Heritage: About the Isle of Man
- Day 7
The island has more Viking silver per square kilometre than England, Wales, Scotland and Ireland. My pencil case has one silver crayon. It counts. Manx National Heritage: Manx Museum
- Day 8
A ghostly black dog is said to haunt Peel Castle’s isle. I am said to haunt the bottom of pencil cases. Same job, smaller dog. Manx National Heritage: Peel Castle
- Day 9
At Peel Castle you can look out to sea for seals. I looked. A seal looked back. Nobody rubbed anything out. Manx National Heritage: Peel Castle
- Day 10
Cronk Sumark’s ramparts are stone melted together by great heat. I once sat on a radiator. Similar result. Manx National Heritage (archived gov.im page, 2012): Iron Age Fortifications
- Day 11
South Barrule had four or five lines of sloping timber stakes to keep people out. I just have a sign saying “Do not rub”. Manx National Heritage (archived gov.im page, 2012): Iron Age Fortifications
- Day 12
Cronk ny Arrey Laa means “hill of the day watch”. My hill is the bottom of the school bag, and I watch nothing. Andrew Johnson, “Watch and Ward on the Isle of Man” (Scottish Society for Northern Studies, 2002)
- Day 13
Hango Broogh may have had a fire pit of gorse, ready to light quickly. I am ready to rub out quickly. Well, eventually. Andrew Johnson, “Watch and Ward on the Isle of Man” (Scottish Society for Northern Studies, 2002)
- Day 14
Odin’s Raven sailed from Norway to the Isle of Man in 1979. I sailed from my desk to the floor. It took one second. Manx National Heritage: House of Manannan
- Day 15
The Isle of Man is 52 kilometres long. I am 5 centimetres long, and proud of every one of them. Manx National Heritage: About the Isle of Man
- Day 16
Davey says Castle Rushen cannot be dated by archaeology even to the nearest hundred years. Nobody can date me either. I have no label. Peter Davey, “Manx archaeology in the high Middle Ages” (Scottish Society for Northern Studies, 2002)
Want more of Useless on paper? The Isle of Man Castles & Forts Family Activity Pack has colouring pages, a maze, jokes from Useless the Eraser and a 20-question quiz to do together (paid download, $3.49 USD, A4 and US Letter).