| Year | 1956 |
| Date | 23-Aug |
| Volume | 115 |
| Issue | 2,883 |
| Page | 282 |
| Category | Locomotive |
| Part | |
| Title | Facts About 'Tugboat Annie' |
| Author | LBSC |
| Notes | Misconceptions and valve gear. Officials' comments, easy maintenance, unit valve gears, valve gear on W. van Brocklin's 4-4-0, the Holcroft gear, cause of valve failure, enomous strain, negligible wear, a word with Mr. Coffin, 110 lb. per minute, the Holcroft valve gear on Tugboat Annie, a modernised American 4-4-0 |