| A | B |
|---|
| Biggs | loud mouth; disrespectful of Mars |
| Ylla | spouse who turns to to earthmen because she is neglected |
| Samuel Teece | racist |
| Benjamin Driscoll | plants trees on Mars. |
| Tomas Gomez | settler who meets a Martian from another time period |
| Spender | Ashamed of Earthling's behavior towards Mars |
| Jonathan Williams | Captain of the second expedition |
| John Black | captain of the third expedition |
| Wilder | captain of the fourth expedition |
| Hatha way | Lost his family. Recreates a new one |
| Alice Hathaway | a robot spouse |
| Genevieve Selsor | loves chocolate and is found in a beauty parlor |
| Silly | Leaves the racism |
| Mr. Xxx | Commits suicide when he thinks he's been infected with insanity |
| Samuel Hinkston | Thinks Mars could be heaven |
| Sam Parkhill | Kills a Martian and wants a hotdog stand |
| Stendahl | Recreates the house of Usher on Mars |
| Garrett | Investigator of Moral Climates from Earth |
| 27 years | Action from novel takes place over this amount of time |
| Insane asylum | Where crew from second expedition meet their demise |
| Tyrr | Martian name for Mars |
| Fantasy books | Destroyed in the Great Fire of 1975 |
| Elderly | Last people to Mars |
| Mr. Pritchard | Goes to Mars to escape the nuclear war threat on Earth |
| The Loneliness | "Great illness" preventing first settlers on Mars |
| Some 90,000 people | How many people arrived after only six months after the First Settlers |
| A Smile | Tomas Gomez's weapon |
| Tom LaFarge | Afraid of going to town due to other people's desires |
| A map of the world | The last thing Mr. Thomas throws on the fire |
| Mrs. McClellan | Lived in the house cleaned by robot mice |
