Observationes Medicae (Tulp) Observationes Medicae (Tulp) Observationes Medicae is a 1641 book by Nicolaes Tulp. Tulp is primarily famous today for his central role in the 1632 by Rembrandt of the Amsterdam Guild of Surgeons, which commemorates his appointment as praelector in 1628. "Observationes Medicae" is also the title commonly used by early Dutch doctors in the 16th and 17th centuries who wrote up their cases from private practise in Latin to share with contemporary colleagues. Though already well known at the time his book was written, Professor Tulp enjoyed international fame after publishing this book, and in 1652 a second edition was
The Doctor (Doctor Who) of the Dead", confirmed to have been his name towards the end of "Forest of the Dead". The events of "The Time of the Doctor" make it clear that his people, the Time Lords, know his true name, despite referring to him by his chosen alias as "the Doctor", even in formal settings such as court. Although listed in the on-screen credits for nearly twenty years as "Doctor Who" or "Dr Who", the Doctor is seldom called by that name in the programme, except in a tongue-in-cheek manner. For example, in "The Gunfighters" the Doctor assumes the name of Doctor