Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Number | Builder | Date built | Wheel arrangement | Driving wheels | Cylinders | Boiler pressure | Notes |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Selsey | 2 | Peckett and Sons | 1897 | 2-4-2 T | 2ft 9in | 10" x 15" | 140 psi | New |
| Sidlesham | 3 or 2 | Manning Wardle | 1861 | 0-6-0 ST | 3ft 2in | 11" x 17" | 120 psi | Ex- industrial |
| Hesperus | 4 or 2 | Neilson and Company | 1871 or 1872 | 0-4-2 ST | 3ft 1in | 10" x 18" | 90 psi | Ex- PDSWJR |
| Ringing Rock | 5 or 2 | Manning Wardle | 1883 | 0-6-0 ST | 3ft 2in | 12" x 17" | 120 psi | Ex-industrial |
| Chichester (first) | 1 or 3 | Longbottom, Barnsley | 1847 | 0-4-2T | 3ft 6in | 11" x 18" | 120 psi | Built for GWR as 0-6-0 |
| Chichester (second) | 6 or 4 | Hudswell Clarke | 1903 | 0-6-0 ST | 3ft 1in | 12" x 18" | 120 psi | Ex-industrial |
| Morous | 7 or 4 | Manning Wardle | 1866 | 0-6-0 ST | 3ft 2in | 11" x 17" | 120 psi | Ex- SMR |
Question:
What is the boiler pressure for the Hesperus model?
Answer:
90 psi