Happy boyfriend, Sincere lover, Slightly dangerous flatterer, Friendly, enterprising, skillful, brave young man; that is the meaning of this card taken in isolation.
This Jack or, better to say – Valet – has many particular meanings that are more or less favourable.
Isolated, pulled from a deck by a young girl or woman, he represents her fiancé, a dark, honest and good young man; but if he is between two spades, his family and friends will oppose the marriage. It will take place anyway, despite all the resistance.
For a young man, he represents his more successful and wealthier rival; but between two heart cards, this rival will be ousted.
For a divorced person or a widower, it’s the announcement of his/her next marriage.
Finally, by any other person, this card ensures complete success in everything they would do.

Having on the right a
Spade ♠: You will meet a young man who has just become rich or famous. This is your chance. Don’t waste it.
Heart ♥: An OK, but not great boyfriend or girlfriend. You can do better in love. However, if he or she is generous in bed and thinks of you, this omen might be misleading. Count all the heart cards that you draw. If you get many – maybe the other cards are trying to tell you something better about your Jack of clubs.
Diamond ♦: Wrong idea. Whatever you are stubbornly convinced and arguing about – take a second look.
Club ♣: Difficulties. – Delay of a marriage due to insufficient wealth or uncertain career.

Having on the left a
Spade ♠: New acquaintance of a pretty brown (brunet) boy, but very silly, although believing himself to be spiritual. Call spade a spade, and call stupid a stupid.
Heart ♥: Discreet love. – Beneficial friend.
Diamond ♦: Visit of a “bon vivant” friend, who will bring you joy and happiness.
Club ♣: Complete success in any business decision that you are agonising about.

EXCEPTIONS.
Between two Spades: Delayed marriage which will only take place after meeting and gaining the favour of the parents.
Between two Hearts: Rivalry that will not be fatal, but very very damaging. If you know who your rival is – strike first.

The Seven of clubs, isolated, means: Small profit. – Pleasure.
Pulled from a deck of cards by a young man, this card announces that he will marry or get into a relationship with a generous brunette girl. Generous doesn’t only mean money – she might be generous in feelings, love and bed pleasures.
For a young girl, unmarried or a divorced woman, it means: Not very dangerous rivalry;
For a professional stuck in a lousy job: Upcoming progress;
For a divorced man: Weakness in love;
For any other person: Gain, profit, pleasure.

This Seven having on the right a
Spade ♠: Rivalry. – Winning at court.
Heart ♥: 1° To a young girl: You are loved by a handsome young man;
2° To a young man: You are loved by a pretty young brunette;
3° To any other person: You are loved by your friends.
Diamond ♦: A rich and generous young woman will care about you; she will save you from embarrassment.
Club ♣: Money success. – Filthy rich couple in the long run.

Having on the left a
Spade ♠: Absolute lack of everything you want; but it won’t last long.
Heart ♥: A marriage of love that is not very fortunate money wise, but very happy. – Pleasures in the city.
Diamond ♦: Pleasant holiday trip. – Small profit.
Club ♣: A small amount of money that is lost and will come back to you.

EXCEPTIONS.
Between two cards of the same value: Gift.
Between two Red Sevens: Pregnancy. Birth of a healthy child. – Abundance.
Between two Black Sevens: Calculated and cruel jealousy of women. Be careful, because they will try to destroy either your career or your family or both.

The King of Diamonds sometimes symbolizes a soldier, or more generally – a man in a dangerous occupation, exposed to risks of injury or violent death (policeman, firefighter, roof-tiler, aircraft pilot and similar professions with elevated risks). For a young woman or a divorced woman, the isolated card means a proposal for marriage from a man in a dangerous occupation.
It also represents a blond man, self-important, haughty, fearsome, deceitful; in a word, a bad man.
It is one of the cards whose meaning depends mostly on the cards surrounding it.
So the number of its exceptions, i.e. special cards that give it a different meaning, is quite varied, as you will see below.

This card announces, having on the right a
Spade ♠: Naughty, quarrelsome man, whom you should be wary of.
Heart ♥: A beginning of a relationship with someone, who is not good for you. If the consultant is married: new acquaintance not to be frequented.
Diamond ♦: Flatterer of which we have everything to fear.
Club ♣: Somebody will try to steal from you.

Having on the left a
Spade ♠: Obstacle in your projects by a blond man.
Heart ♥: Serious suitor. If the consultant is old or married: loving and honest man.
Diamond ♦: Quarrel.
Club ♣: Advantageous offer by a blond man.

EXCEPTIONS.
The King of diamonds placed between two face cards, whatever they may be, means: Disunity, confusion.
With the Jack of DiamondS: News from a young man in a dangerous profession.
Between two SpadeS: Rivalry.
With the Queen of HeartS: Love of a soldier. For married or elderly people: Upcoming acquaintance of an honest man, military.
Having an ace on the right, the usual meaning of the card on the left is nil. Instead, this announces, regardless of the colour of the card on the left – upcoming trip away related to some danger or a man in dangerous business.
The King of Diamonds, between two diamonds, announces the visit of a man from out of town.