Companion Series
Happy Thought Library
Published by D. Lothrop & Co.
| 1. Child's Companion | by George Etell Sargent |
| 2. Larry Connor's Charge | by the author of "Harry's Battles" |
| 3. Mark Woodford's Promise; or, A Boy's Obedience | by Anonymous |
| 4. Willie Maitland; or, The Lord's Prayer | Illustrated by Unknown |
| 5. "Who Is My Neighbor?" | by Mary D. R. Boyd |
| 6. Bud and Blossom | by Mary Latham Clark |
The Companion Series was introduced by D. Lothrop & Co. in 1873
with books #1-3.
All six books were introduced as the "Happy Thought Series" by D.
Lothrop & Co. in 1877
Cloth. 18 mo.
A number of formats have been seen for these titles but they all appear to be part of various Lothrop publisher's series. No cover formats for these series have been seen with certainty.