Very accurate assumption.
Thompsons built two Farringfords one in 1896,(yn 342),and the other as you say, (yn 418). The ship here was one of four built in succession at Thompsons for their "Uncle Stanley and John"
554 Silveray; 555 Silverash, one record has it as 'Silver Rash;" 556 Silverbelle; 557 Silverhazel. Ash, Belle, Hazel are obvious but what was "ay"? or was it meant to be Silverray?
Silverash had a Doxford 680L4 engine, number 157