These lectures were his only formal education in the field of horticulture, although as a member of staff at the botanic garden he built up a practical and theoretical knowledge that would become the foundation of his career.

It was around this time that Thomas began to collect old shrub and climbing rose varieties, many of which had fallen out of favour because they only flowered once during the season.

[3] It was here also that he began introducing new or rediscovered garden plants – notable introductions from this period include the perennial Geranium 'Claridge Druce'.

They also provided much-needed information about the history and extent of the genus at a time when old varieties were being overshadowed by their repeat flowering and showier cousins hybrid teas and floribundas.

[3] This was a relationship that was to continue for the succeeding 20 years and gave him the opportunity to work with a vast array of plants in spectacular historic settings, such as Sissinghurst Castle and Mount Stewart.

[7] It is Mottisfont Abbey – a creation that he himself described as a "masterpiece" – where his rose collection found its final home, and where his garden design skills can be best appreciated.

[9][10] He influenced a number of other notable rose growers, including Peter Beales, who worked with him for a short time at Hillings.