Trial

Figure 1 and figure 2.

Figure 1 - create a document in Illustrator and by using the grids to measure the right size of the postcards which is 105x210mm.

Figure 2 - Copied and pasted Brunel's portrait > group it.

Figure 3.

Figure 3 - I placed it in the middle of the grids

 Figure 4

Figure 4 - these are how my postcards look like with Brunel's portrait. To be honest I don't know if it going to work as I am afraid if audience would not be able to recognise him especially with the bottom two images form figure 4. I think I need to add his inventions at the background first then decide.