T-Puzzle plan - How to make T-puzzle

While making puzzles, let us make a model of The T-Puzzle, a famous old puzzle that is more difficult to assemble than it looks.

Figure 23 shows it put together. The key to the solution lies in properly placing the irregular-shaped block at the intersection of the vertical and horizontal members of the letter. Once you get the position of this, the other pieces are easily assembled.

Excerpt from the book: "Carpentry & mechanics for boys: up-to-the-minute handicraft" by Hall, A. Neely (Albert Neely), Publication date [c1918]
Publisher Boston: Lothrop, Lee & Shepard Co.