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 | Gauge | Builder | Type | Date | Works number | Notes |
| --- | --- | --- | --- | --- | --- | --- |
| No.774 | 2 ft (610 mm) | Baguley | 4wPM | 1919 | 774 | Undergoing restoration, not on display, purchased 1998 |
| Dot | 18 in (457 mm) | Beyer Peacock | 0-4-0WT | 1887 | 2817 | Built for the internal Gorton locomotive works of Beyer Peacock. Donated to the Museum in 1961. |
| Rough Pup | 2 ft (610 mm) | Hunslet | 0-4-0ST | 1891 | 541 | Built for the Dinorwic Quarry railway. Preserved as withdrawn from service, in the Museum since 1964. |
| No. 13 | 1 ft 10 in (560 mm) | William Spence Ltd. | 0-4-0T | 1895 |  | One of a fleet of overtype locomotives built for the Guinness St. James's Gate Brewery in Dublin and the first loco donated to the Museum, in 1956. |
| George Henry | 1 ft 10 3⁄4 in (578 mm) | De Winton | 0-4-0VB | 1877 |  | ex-Penrhyn Quarry locomotive. Donated to the Museum in 1964 |
| Jubilee 1897 | 1 ft 11 1⁄2 in (597 mm) | Manning Wardle | 0-4-0ST | 1897 | 1382 | Built for the Cilgwyn Quarry in the Nantlle Valley. Sold to the Penrhyn Quarry in 1928; withdrawn 1955. Donated to the Museum in 1963 |
| Dundee Gasworks No.2 | 1 ft 11 1⁄2 in (597 mm) | Kerr Stuart | 0-4-0WT | 1907 | 720 | Built for the Dundee gasworks railway. Acquired by the Museum in 1961. Major restoration work was carried out in 2004 |
Question:
how many locomotives are on display at the narrow gauge railway museum?
Answer:
7