Julius Winkman was a shop owner and one of the most prominent illegal relic dealers. He bought stolen relics and auctioned them. His shop, Bloomsbury Antiques Emporium, acted as a front.
He was a small but muscular man. His height was a little higher than Lucy Carlyle's. He had a big head, thick neck, large shoulders, wide chest, and short and stubby feet. His and his family's physical descriptions were often described humorously by the narrator Lucy.
Adelaide Winkman, the wife: a big-boned woman in her early fifties (Book 2:13).
Leopold Winkman, the son of the couple: 12 or 13 years old. a miniature version of Julius Winkman. "Leopold Winkman wasn't very tall. He had the bulky but diminished physique of a wrestler who'd been hit by a grand piano falling from a height, and the wide brim of his hat and loud checks on his designer suit only made him look more horizontal still. He was in his mid-teens, his face dumpling-soft and malleable, with a toad-like mouth strongly reminiscent of his father, the imprisoned Julius Winkman. His eyes were bullet-hard and blue." 
Pre-Lockwood & Co. Events Edit
Julius Winkman acquired the Bloomsbury Antiques Emporium from a previous owner who was accidentally crushed by an Indian erotic statue (Book 2:13).
Lockwood & Co. Events Edit
(Book 2) When the Bone Glass was stolen from Kensal Green, Flo Bones advised Lockwood & Co. that it may probably land on Julius Winkman. Winkman was a buyer of stolen relics and auctioneer of the same goods.
Anthony Lockwood and Lucy Carlyle pretended to be casual civilians, visited Winkman's Store, and tried to survey the store's relics (in search of the Bone Glass). They were uncovered to be agents by Winkman. Through his research and informants, Winkman learnt the identity of the two youths.
Winkman held his auction at Rostock Fisheries warehouse. Among the attendants was Sir Rupert Gale (who was unnamed at Book 2). Lockwood & Co. managed to infiltrate the auction, cause disorder, steal the Bone Glass, and escape.
When Lucy and Anthony rushed to the cemetery in search of George, Julius Winkman had already sent his men to attack the youths. Lockwood & Co. with the help of Kipps's team defeated the assailants.
Winkman was captured.
(Book 3) Anthony Lockwood, George Cubbins, and Lucy Carlyle had all testified against Winkman during his trial. Winkman was given about 20 years (the years are estimates) in Wandsworth Prison. The business was then taken over by the wife and son, and it was kept low.
Before the carnival, Leopold Winkman found and threatened Lucy about his father's early release.
(Book 4) Adelaide Winkman was illegally buying worthy items to be auctioned. Among the items bought was the Skull which was stolen earlier by Harold Mailer from Lucy's apartment.
Lucy, as of now, was going solo as an agent for hire. She hired Lockwood & Co. to help her in retrieving the Skull. They managed to sneak into Adelaide Winkman's auction but they failed to reacquire the Skull.
(Book 5) Julius Winkman was released after 2 years (of about 10 years) in prison for "good behavior". He was approached by Sir Rupert Gale to gather a group of men and attack Lockwood's home. Seeing a chance for revenge, Winkman complied.
At the siege of Lockwood's home, Winkman was heavily wounded when he fell on his own mercenary's drawn out knife. He died soon after. His spirit was seen floating away by Lockwood & co to some place else; which means that his soul is specially connected to something else, not to his body/bones. His Source was not mentioned anymore.
What would become of Adelaide and Leopold was not explored. But then the actions of Julius at Lockwood's home was known to DEPRAC.
- ↑ The Creeping Shadow, III: Lost and Found, Ch. 17