What three people joined the Lewis and Clark expedition?

Besides Meriwether Lewis and Capt. William Clark of course...

1.) Sergeant Charles Floyd (1782 - 1804)
2.) Sergeant Patrick Gass (1771 - 1870)
3.) Sergeant Nathanial Hale Pryor (1772-1831)
4.) Sergeant John Ordway (ca. 1775-ca. 1817)
5.) Corporal Richard Warfington (1777-?)
6.) Private John Boley (dates unknown)
7.) Private William E. Bratton (1778-1841)
8.) Private John Collins (?-1823)
9.) Private John Colter (ca. 1775-1813)
10.) Private Pierre Cruzatte (dates unknown)
11.) Private John Dame (1784-?)
12.) Private Joseph Fields (ca. 1772-1807)
13.) Private Reuben Fields (Joseph's brother) (ca. 1771-1823?)
14.) Private Robert Frazer (?-1837)
15.) Private George Gibson (?-1809)
16.) Private Silas Goodrich (dates unknown)
17.) Private Hugh Hall (ca. 1772-?)
18.) Private Thomas Proctor Howard (1779-?)
19.) Private Francois Labiche (dates unknown)
20.) Private Jean Baptiste LePage (1761-1809)
21.) Private Hugh McNeal (dates unknown)
22.) Private John Newman (ca. 1785-1838) (expelled from the expedition)
23.) Private Moses B. Reed (dates unknown) (expelled from the expedition)
24.) Private John Potts (1776-1808?)
25.) Private John Robertson (ca. 1780-?)
26.) Private George Shannon (1785-1836) (youngest member)
27.) Private John Shields (1769-1809)
28.) Private John B. Thompson (dates unknown)
29.) Private Howard Tunn (1770 - ?)
30.) Private Ebenezer Tuttle (1773-?)
31.) Private Peter M. Weiser (1781-?)
32.) Private William Werner (dates unknown)
33.) Private Isaac White (ca. 1774-?)
34.) Private Joseph Whitehouse (ca. 1775-?)
35.) Private Alexander Hamilton Willard (1778-1865)
36.) Private Richard Windsor (dates unknown)
37.) Engagé Alexander Carson (ca. 1775-1836)
38.) Engagé Charles Caugee (dates unknown)
39.) Engagé Joseph Collin (dates unknown)
40.) Engagé Jean Baptiste Deschamps (dates unknown)
41.) Engagé Charles Hebert (dates unknown)
42.) Engagé Jean Baptiste La Jeunesse (?-1806?)
43.) Engagé Etienne Malboeuf (ca. 1775-?)
44.) Engagé Peter Pinaut (ca. 1776-?)
45.) Engagé Paul Primeau (dates unknown)
46.) Engagé Franois Rivet (ca. 1757-1852)
47.) Engagé Peter Roi (dates unknown)
48.) Toussaint Charbonneau (Sacagawea's husband) (1767-1843)
49.) Sacagawea (c. 1788-1812)
50.) Jean-Baptiste Charbonneau (Sacagawea's son) (1805-1866)
51.) Interpreter George Drouillard (?-1810)
52.) York (Clark's slave) (c. 1770-March 1831?)
53.) "Seaman" or "Scannon", Lewis' large black Newfoundland dog